Research Reports
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A
- abandonment
- accelerated bridge construction
- accelerated tests
- acceleration (mechanics)
- acceptance
- access
- accessibility
- accuracy
- acoustic equipment
- activity choices
- adaptive control
- additives
- adhesion
- adhesives
- administration
- admixtures
- adolescents
- advanced public transportation systems
- advanced traffic management systems
- advanced traveler information systems
- advanced vehicle control systems
- aerial surveying
- aerodynamic force
- aerodynamics
- age
- aged
- aged drivers
- age groups
- aggregate gradation
- aging (biology)
- aging (materials)
- agricultural economics
- agricultural exemption
- agricultural industry
- agricultural products
- agriculture
- air
- aircraft by ownership
- airlines
- air pollution
- airport infrastructure
- airport operations
- airport runways
- airports
- air quality
- air quality management
- airspace utilization
- air traffic
- air transportation
- air travel
- air voids
- alcohol fuels
- alcoholic beverages
- alcohol tests
- alcohol use
- alertness
- algorithms
- alignment
- alkali silica reactions
- alternate fuels
- alternatives analysis
- aluminous cement
- analysis
- analysis of variance
- analytic hierarchy process
- anchors (structural connectors)
- animals
- animal vehicle crashes
- annual average daily traffic
- annual reports
- antistrip additives
- apartment buildings
- applications
- arterial highways
- artificial intelligence
- ash content
- asphalt
- asphalt concrete
- asphalt concrete pavements
- asphalt content
- asphalt mixtures
- asphalt pavements
- assessments
- asset management
- associations
- attitudes
- auditing
- automated clearance
- automated highway systems
- automated toll collection
- automatic data collection systems
- automatic fare collection
- automatic vehicle detection and identification systems
- automatic vehicle location
- automation
- automobiles
- automobile travel
- autonomous vehicles
- auxiliary lanes
- average daily traffic
- aviation
- awareness
- axial loads
- axle load force
- axles
B
- backcalculation
- back haul
- bacteria
- balance of payments
- bankruptcy
- barges
- barriers (roads)
- base course (pavements)
- Bayes' theorem
- beams
- bearing capacity
- bedrock
- before and after studies
- behavior
- benchmarks
- bend tests
- beneficiation
- benefit cost analysis
- benefits
- bents
- best practices
- bibliographies
- bicycle counts
- bicycle demand estimation
- bicycle facilities
- bicycle network analysis
- bicycle route choice
- bicycle traffic assignment
- bicycle travel
- bicycling
- binder content
- biodiesel fuels
- bituminous binders
- bituminous overlays
- bonding
- bond strength (materials)
- boreholes
- bottlenecks
- bottom ash
- box cars
- box culverts
- braces
- brakes
- branch lines
- breaking loads
- bridge abutments
- bridge approaches
- bridge construction
- bridge decks
- bridge design
- bridge engineering
- bridge foundations
- bridge inspection
- bridge management systems
- bridge members
- bridge piers
- bridge railings
- bridges
- bridge substructures
- bridge superstructures
- brines
- broadcasting
- buckling
- budgeting
- building codes
- building materials
- built environment
- bulk cargo
- businesses
- business practices
- bus priority
- bus rapid transit
- bus routes
- bus stops
- bus stop shelters
- bus transit
- bus transit operations
C
- calcium chloride
- calcium hydroxide
- calcium sulfates
- calculation
- calibration
- cameras
- campus parking
- campus transportation
- capacitors
- capital costs
- capital investments
- captive riders
- carbon dioxide
- carbon fibers
- cardiovascular system
- cargo handling
- car ownership (railroads)
- carpools
- carriers
- car supply (railroads)
- case studies
- cash flow
- cast in place concrete
- cellular telephones
- cement
- cement treated soils
- channel flow
- channels (waterways)
- chemical agents
- chemicals
- chemical spills
- children
- child restraint systems
- chip seals
- chlorides
- choice models
- cities
- cities and towns
- civil engineering
- classification
- clay
- clay soils
- clear zones
- climate
- climbing lanes
- cluster analysis
- coal
- coal industry
- coarse aggregates
- coefficient of subgrade reaction
- cognition
- cohesive soils
- cold region
- college students
- color
- columns
- commercial drivers
- commercial vehicle operations
- commercial vehicles
- commodities
- commodities by type
- commodity flow
- communications
- communities
- commuters
- commuting
- compaction
- competition
- compliance
- composite materials
- composite structures
- compressed natural gas
- compressibility
- compressible soils
- compression tests
- compressive strength
- computer aided design
- computer algorithms
- computer architecture
- computer graphics
- computer models
- computer program documentation
- computer programming
- computer programs
- computers
- computer security
- computer vision
- concrete
- concrete aggregates
- concrete bridges
- concrete construction
- concrete overlays
- concrete pavements
- concrete structures
- condition surveys
- cone penetrometers
- conferences
- confidence limits
- congestion management systems
- connected vehicles
- consolidation
- consolidations
- construction
- construction and maintenance personnel
- construction industry
- construction management
- construction projects
- construction scheduling
- consultants
- consumer preferences
- consumers
- containerization
- containers
- container terminals
- container traffic
- contaminants
- continuing education
- continuously reinforced concrete pavements
- continuous spans
- contractors
- contract rates
- contracts
- cooperation
- cooperatives
- coordination
- cores (specimens)
- corn
- corporations
- corrosion
- corrosion protection
- corrosion resistance
- cost accounting
- cost control
- cost effectiveness
- cost estimating
- cost indexes
- cost of service pricing
- costs
- counseling
- countermeasures
- counties
- county government
- county roads
- covered hopper cars
- COVID-19
- cracking
- crash analysis
- crash causes
- crash characteristics
- crash cushions
- crash data
- crashes
- crash exposure
- crash injuries
- crash injury research
- crash modification factors
- crash rates
- crash reconstruction
- crash records
- crash reports
- crash risk forecasting
- crash severity
- creep
- creep properties
- creep tests
- crops
- cross sections
- crosswalks
- crosswinds
- crushed aggregates
- culverts
- curricula
- curvature
- curved bridges
- customers
- customer satisfaction
- customer service
- cyclic strength
- cyclic tests
- cyclists
D
- dams
- data analysis
- data banks
- database management systems
- databases
- data collection
- data displays
- data fusion
- data management
- data mining
- data privacy
- data quality
- data reduction
- data sharing
- data storage
- deadheading
- debonding
- debris flows
- deceleration
- decision making
- decision support systems
- deer
- defects
- deflection
- deflection tests
- deformation
- deformation curve
- degradation (thermodynamics)
- deicing chemicals
- delamination
- delays
- delivery service
- demand
- demand responsive transportation
- demographics
- demonstration projects
- density
- derailments
- deregulation
- design
- design build
- design charts
- design methods
- design speed
- design standards
- detection and identification system applications
- detection and identification systems
- detection and identification technologies
- detectors
- deterioration
- developing countries
- development
- deviatoric stress
- diagnostic tests
- diamond interchanges
- diaphragms (engineering)
- dilemma zone
- directories
- disability evaluation
- disaster preparedness
- disaster resilience
- disasters and emergency operations
- diseases and medical conditions
- disincentives
- dislocation (geology)
- dispatching
- dissipation
- distance
- distance learning
- distraction
- districts and authorities
- documents
- downgrades (roads)
- drafting
- drainage
- drinking establishments
- driver education
- driver errors
- driver experience
- driver information systems
- driver licenses
- driver licensing
- driver monitoring
- driver performance
- driver rehabilitation
- drivers
- driver training
- driveways
- driving
- driving cessation
- driving simulators
- driving without a license
- drone aircraft
- drones
- drugged drivers
- drunk drivers
- drunk driving
- ductility
- durability
- durability tests
- dust control
- dwellings
- dwell time
- dynamic loads
- dynamic models
- dynamic modulus of elasticity
- dynamic penetration test
- dynamic tests
- dynamic traffic assignment
E
- earnings
- earthquake engineering
- earthquake resistant design
- earthquakes
- ecodriving
- econometric models
- economic analysis
- economic benefits
- economic conditions
- economic development
- economic efficiency
- economic factors
- economic growth
- economic impacts
- economic indicators
- economic models
- economics
- economies of scale
- education
- education and training
- education and training methods
- elastic bodies
- elasticity (economics)
- elasticity (mechanics)
- electrical resistivity
- electric batteries
- electric buses
- electricity
- electric power transmission
- electric power transmission facilities
- electric utilities
- electric vehicle charging
- electric vehicles
- electrochemical corrosion
- electronic controllers
- electronic data interchange
- electronic equipment
- electron microscopy
- elevators
- embankments
- emergency management
- emergency medical services
- emergency preparedness
- emergency response time
- emotions
- empirical methods
- employee benefits
- employee compensation
- employee relations
- employees
- employers
- employment
- energy
- energy absorption
- energy conservation
- energy consumption
- energy resources
- engineering
- environment
- environmental impacts
- epoxides
- epoxy resins
- equations
- equilibrium (systems)
- equipment
- equipment leasing
- equipment replacement
- equivalent single axle loads
- erosion
- erosion control
- escape lanes
- estimates
- estimating
- estimation theory
- ethanol
- evacuation
- evaluation and assessment
- examinations
- exclusive permissive phasing
- exempt carriers
- exemption
- expansion joints
- expansive concrete
- expenditures
- expenses
- experiments
- expert systems
- exports
- express buses
- express lanes
- externalities
- eye movements
F
- facilities
- failure
- failure analysis
- falling weight deflectometers
- families
- fare collection
- fares
- farming
- farms
- farm vehicles
- fatalities
- fatigue (mechanics)
- fatigue (physiological condition)
- fatigue cracking
- fatigue strength
- fatigue tests
- feasibility analysis
- federal aid
- federal government agencies
- fees
- females
- fertilizers
- fiber composites
- fiberglass
- fiber optics
- fiber reinforced concrete
- fiber reinforced materials
- fiber reinforced plastics
- fiber reinforced polymers
- fibers
- field studies
- field tests
- fills
- filters
- filtration
- finance
- financial analysis
- financing
- fine grained soils
- finite differences
- finite element method
- fire resistance
- fire resistant coatings
- fixed base operations
- fixed routes
- flaggers
- flammability tests
- flashing traffic signals
- flaw detection
- fleet management
- flexibility
- flexible pavements
- flexible structures
- flexural strength
- flocculating agents
- flood hydrographs
- flood plains
- floods
- fluid dynamics
- fly ash
- focus groups
- fog
- food
- food industry
- footbridges
- forecasting
- formatting
- forms of business or industry
- foundation engineering
- foundation soils
- fracture mechanics
- fracture properties
- frames
- freeway management systems
- freeway operations
- freeways
- freeze thaw durability
- freeze thaw tests
- freezing point
- freight cars
- freight handling
- freight service
- freight terminals
- freight traffic
- freight trains
- freight transportation
- friction course
- friction materials
- frigid regions
- front seat occupants
- frost susceptible soil
- fuel conservation
- fuel consumption
- fuel mixtures
- fuels
- fuel taxes
- future
G
- gasoline
- gender
- genetic algorithms
- geographic information systems
- geography
- geogrids
- geometric design
- geometric segments
- geometry
- geosynthetics
- geotechnical engineering
- girder bridges
- girders
- glass fiber reinforced concrete
- glass fiber reinforced plastics
- glass fibers
- global positioning system
- global warming
- government agencies
- government funding
- graduated licensing
- graduate study
- grain
- grain elevators
- grain terminals
- granular materials
- graphical user interfaces
- graphics
- grasslands
- gravel
- gravel pits
- gravel roads
- grocery stores
- ground settlement
- grout
- guardrails
- guidelines
- guides to information
- guides to the literature
- gusset plates
H
- handbooks
- handling and storage
- haul distance
- hazardous materials
- hazardous wastes
- hazards and emergency operations
- headways
- health
- health care
- health care facilities
- heart rate
- heavy metals
- heavy vehicles
- heliports
- high mast lighting
- high occupancy toll lanes
- high occupancy vehicle lanes
- high performance steel
- high risk drivers
- high risk locations
- high school students
- high strength steel
- high temperature
- highway access management
- highway advisory radio
- highway bridges
- highway capacity
- highway curves
- highway delineators
- highway departments
- highway design
- highway engineering
- highway engineers
- highway factors in crashes
- highway grades
- highway maintenance
- highway operations
- highway planning
- highways
- highway safety
- highway traffic
- highway traffic control
- highway traffic control systems
- highway transportation
- highway travel
- highway user taxation
- history
- hopper cars
- hot mix asphalt
- hours of labor
- households
- housing
- human error
- human factors
- human factors in crashes
- human resources management
- humidity
- hurricanes
- hybrid vehicles
- hydraulics
- hydraulic structures
- hydrodynamics
- hydrology
I
- ice
- icing
- image analysis
- image processing
- impact detection
- impact loads
- impacts
- impact studies
- impact tests
- impaired drivers
- implementation
- imports
- improvements
- incentives
- incident detection
- incident management
- income
- Indian reservations
- industrial engineering
- industrial location
- industries
- industry structure
- inelastic stress
- inflation
- information dissemination
- information management
- information processing
- information services
- information storage and retrieval systems
- information systems
- information technology
- infrared imagery
- infrastructure
- injuries
- injury severity
- inland water transportation
- innovation
- inspection
- inspection stations
- inspectors
- installation
- institutional issues
- instructors
- instrumentation
- integrated systems
- intelligent compaction
- intelligent control systems
- intelligent transportation systems
- intelligent vehicles
- interchanges and intersections
- intercity bus lines
- intercity transportation
- intercity travel
- interdisciplinary studies
- interest rates
- interfaces
- intergovernmental relations
- intermodal facilities
- intermodal transportation
- international
- international compacts
- international trade
- internet
- intersections
- interstate commerce
- interstate highways
- interstate transportation
- interviewing
- inventory
- inventory control
- investments
- irrigation
J
- jacketing (strengthening)
- job opportunities
- jobs
- job satisfaction
- jointless bridges
- joints (engineering)
- judges
K
L
- labor
- laboratory studies
- laboratory tests
- labor costs
- labor force
- labor law
- labor negotiations
- labor productivity
- labor relations
- labor unions
- Lagrangian functions
- laminated wood
- land
- landslides
- land use
- lane lines
- laser radar
- lateral placement
- lateral supports
- latex modified concrete
- law enforcement
- law enforcement personnel
- laws
- leaching
- learning
- leasing
- least overall cost
- left turn phase
- legal factors
- legislation
- legislation and regulation
- length
- less than truckload traffic
- level of service
- liabilities
- liability
- libraries
- life cycle analysis
- life cycle costing
- lifelines
- life styles
- light rail transit
- lignosulfonate
- limestone aggregates
- linear programming
- linear regression analysis
- line extensions (rail transit)
- lines of track
- links (networks)
- liquefaction
- literature reviews
- livability
- live loads
- livestock
- load and resistance factor design
- load factor
- loading and unloading
- load limits
- loads
- load tests
- load transfer
- local government
- local materials
- local transportation
- location
- location theory
- locomotive engineers
- logistic regression analysis
- logistics
- logits
- longitudinal joints
- longitudinal studies
- long range planning
- long span bridges
- loop detectors
- loss and damage
- low income groups
- low temperature
- low volume roads
M
- machine learning
- machine vision
- macroscopic traffic flow
- magnesium chloride
- main lines
- maintenance
- maintenance equipment
- maintenance management
- maintenance of way
- maintenance practices
- males
- management
- managerial personnel
- manuals
- mapping
- market assessment
- market development
- market dominance
- marketing
- market penetration
- markets
- market segmented groups
- market share
- market structure
- Markov processes
- materials
- materials in specific structural applications
- materials tests
- mathematical analysis
- mathematical models
- mathematical prediction
- mathematics
- measurement
- measures of effectiveness
- measuring instruments
- measuring methods
- mechanical analysis
- mechanical loads
- mechanical properties
- mechanical tests
- mechanistic-empirical pavement design
- mechanistic design
- mechatronics
- median barriers
- medical personnel
- medical services
- medical trips
- medium sized cities
- mergers
- mergers and acquisitions
- mesoscopic traffic flow
- messages (communications)
- methodology
- metrics (quantitative assessment)
- metropolitan areas
- metropolitan planning organizations
- microcomputers
- microelectronic materials
- microscopic traffic flow
- microsimulation
- mills
- mines and mineral products
- minibuses
- minimization
- minorities
- mix design
- mixed integer programming
- mixtures
- mobile applications
- mobile communication systems
- mobility
- modal shift
- modal split
- mode choice
- modems
- modernization
- modules (electricity)
- modulus of elasticity
- modulus of resilience
- moisture content
- moisture damage
- molecular structure
- monitoring
- monopoly
- Monte Carlo method
- montmorillonite
- morale
- motion
- motivation
- motor carriers
- motorcycle crashes
- motorcycle driving
- motorcycle helmets
- motor fuels
- motor vehicles
- mountain roads
- mountains
- multi-agent systems
- multimedia
- multimodal transportation
- multinomial logits
- multiple regression analysis
- multiple unit cars
- multiple vehicle crashes
- multitasking
- multivariate analysis
N
- national security
- Native Americans
- natural gas
- natural gas vehicles
- natural resources
- needs assessment
- neighborhoods
- network analysis (planning)
- networks
- neural networks
- night
- nodes (networks)
- nondestructive tests
- nonlinear equations
- no passing zones
- numbers
- numerical analysis
O
- object oriented programming
- occupant protection devices
- occupational safety
- ocean liners
- ocean shipping
- offenders
- off ramps
- oil region
- oil well drilling
- on ramps
- operating costs
- operating revenues
- operating speed
- operations
- operators (persons)
- opposing traffic
- optical fibers
- optimization
- organic compounds
- organizational effectiveness
- organizational factors
- organizations
- origin and destination
- outreach
- overlays (pavements)
- overpasses
- oversize loads
- overturning
- overweight loads
- owner operators
- ownership
P
- paint
- paratransit services
- parents
- park and ride
- parking
- parking demand
- parking duration
- parking fees
- parking meters
- parks
- partnerships
- passenger information systems
- passengers
- passenger transportation
- passenger vehicles
- passing sight distance
- passing zones
- paved shoulders
- pavement cracking
- pavement design
- pavement distress
- pavement joints
- pavement layers
- pavement maintenance
- pavement management
- pavement management systems
- pavement performance
- pavements
- pavement widening
- paving
- paving materials
- pay
- payment
- peak hour traffic
- peak periods
- pedestrian-vehicle crashes
- pedestrian actuated controllers
- pedestrian areas
- pedestrian movement
- pedestrian safety
- pedestrian traffic
- pedestrian vehicle crashes
- pedestrian vehicle interface
- peer groups
- penalties
- perceived safety
- perception
- performance
- performance evaluations
- performance measurement
- performance measures
- performance tests
- permeability
- permeability coefficient
- permits
- personal computers
- personnel
- personnel development
- personnel management
- personnel performance
- personnel retention
- persons with disabilities
- petroleum industry
- phosphates
- photography
- physical distribution
- physical properties
- physicochemical properties
- pickup trucks
- piers (supports)
- pile foundations
- piles (supports)
- pilot studies
- pipelines
- pipeline transportation
- plains
- planning
- planning methods
- plant location
- plants
- plasticity
- plastics
- poles (supports)
- police
- policy
- policy making
- political factors
- pollutants
- pollution control
- polymer concrete
- polymer fibers
- polymers
- polypropylene
- polystyrene
- population density
- population forecasting
- population growth
- portable equipment
- Portland cement concrete
- ports
- port traffic
- positive train control
- postal service
- potholes
- pozzolanic action
- precast concrete
- precast concrete pavements
- precipitation (meteorology)
- predictive models
- prefabricated bridges
- prestressed concrete
- prestressed concrete bridges
- prestressing
- prevention
- preventive maintenance
- prices
- pricing
- primary highways
- principal types of roads
- private enterprise
- probits
- procedures
- procurement
- production
- productivity
- products
- professional drivers
- professional personnel
- profilometers
- profitability
- profits
- program management
- programming (mathematics)
- programming (planning)
- project management
- propane
- properties of materials
- property management
- prototypes
- public administration
- public information programs
- public opinion
- public participation
- public policy
- public relations
- public transit
- public utilities
- public works
- pull out test
- purchasing
Q
- quality assurance
- quality control
- quality of life
- quality of service
- quantitative analysis
- questionnaires
R
- race
- radar detectors
- radio
- radio equipment
- radio frequency identification
- railroad bridges
- railroad cars
- railroad commuter service
- railroad equipment industry
- railroad grade crossings
- railroad law
- railroad rails
- railroads
- railroad safety
- railroad signals
- railroad tracks
- railroad traffic
- railroad trains
- railroad transportation
- rain
- rainfall
- ramp metering
- ramps (interchanges)
- ranking (statistics)
- ran off road crashes
- rates
- ratings
- reaction time
- real estate development
- real property
- real time control
- real time data processing
- real time information
- rear end crashes
- rear seat occupants
- recently qualified drivers
- recidivism
- reclaimed asphalt pavements
- recommendations
- reconstruction
- recordkeeping
- recreational trips
- recruiting
- recycled materials
- redundancy
- regional analysis
- regional planning
- regional transportation
- registration fees
- registrations
- regression analysis
- regulation
- regulations
- regulatory constraints
- regulatory reform
- rehabilitation (maintenance)
- reinforced concrete
- reinforced concrete bridges
- reinforced concrete pavements
- reinforcement (engineering)
- reinforcing bars
- relational databases
- reliability
- remote control
- remote sensing
- rent
- reorganization
- repair and maintenance businesses
- repairing
- repeated loads
- repeat offenders
- reports
- reregulation
- research
- research projects
- reservations
- residential areas
- residential location
- residential streets
- residual strength
- resins
- resonance frequency
- resource allocation
- resource development and utilization
- response time
- retail trade
- retirement
- retrofitting
- retroreflectivity
- return on investment
- revenues
- reversible traffic lanes
- Reynolds number
- rheological properties
- rheometers
- ride quality
- ridership
- ridesharing
- ridesourcing
- rigid pavements
- risk analysis
- risk assessment
- risk management
- risk taking
- river basins
- road construction
- road construction workers
- road markings
- road pricing
- roads
- road shoulders
- roadside
- road weather information systems
- rock mechanics
- rods
- rolling
- rolling stock
- rollover crashes
- roughness
- roundabouts
- route choice
- routes
- routes and routing
- routing
- rubber
- rumble strips
- runoff
- rural
- rural areas
- rural development
- rural highways
- rural transit
- rural transportation
- rural travel
- rutting
S
- safety
- safety analysis
- safety and security
- safety audits
- safety campaigns
- safety culture
- safety education
- safety factors
- safety programs
- sales
- sampling
- sanctions
- sandy soils
- satellite communication
- saturated soils
- savings
- scale models
- scenic highways
- schedules
- scheduling
- school bus drivers
- schools
- school trips
- science
- scooters
- scour
- seal coats
- sealing compounds
- seasons
- seat belts
- seat belt use
- secondary roads
- security
- seeds
- seismicity
- seismic risk
- selection and appointment
- self compacting concrete
- sensitivity analysis
- sensors
- serviceability
- service agencies
- service disruption
- service life
- sets
- settlement (structures)
- shale
- shale oil
- shared mobility
- shear properties
- shear reinforcement
- shear strain
- shear strength
- shear stress
- sheets
- shipments
- shipping
- shortages
- shortest path algorithms
- short line railroads
- short span structure
- shrinkage
- shuttle service
- sidewalks
- signalization
- signalized intersections
- signal processing
- signs
- silts
- simulation
- single vehicle crashes
- size
- size and weight regulations
- skew bridges
- skidding
- slabs
- sleep
- slip (fluid mechanics)
- slopes
- slope stability
- slush
- small buses
- small cities
- small towns
- smartphones
- smoothness
- snow
- snow and ice control
- snowplows
- snow removal
- snowstorms
- social benefits
- social impacts
- social media
- social service agencies
- socioeconomic factors
- soft rock
- soft soils
- software
- software packages
- soil compaction
- soil compaction test
- soil consolidation test
- soil lime mixtures
- soil mechanics
- soil penetration test
- soils
- soil stabilization
- soil structure interaction
- soil suction
- soil tests
- sovereign immunity
- soybeans
- spacing
- spalling
- spatial analysis
- special events
- specialists
- special user groups
- specifications
- specimens
- speed
- speed detectors
- speeding
- speed limits
- spikes
- splicing
- spot speed
- spreadsheets
- stability (mechanics)
- stakeholders
- standards
- state departments of transportation
- stated preferences
- state government
- state government agencies
- state highway departments
- state highways
- state laws
- state of the art
- state of the practice
- states
- static loads
- static tests
- statistical analysis
- statistical sampling
- statistics
- steel
- steel bridges
- steel rails
- stiffness
- stiffness tests
- stochastic processes
- stone
- stone matrix asphalt
- stopped time delays
- stopping
- storage facilities
- storms
- strain (mechanics)
- strategic planning
- straw
- streamflow
- street closure
- streets
- streetscape
- strengthening (maintenance)
- strength of materials
- stress (psychology)
- stresses
- stripping (pavements)
- structural analysis
- structural connection
- structural design
- structural deterioration and defects
- structural equation modeling
- structural health monitoring
- structural steel
- structural supports
- structural tests
- structure or device
- students
- subgrade (pavements)
- subgrade materials
- subroutines
- subsidies
- sulfur dioxide
- sunlight
- superpave
- supervisors
- suppliers
- supply
- supply chain management
- supporting
- suppressors
- surface course (pavements)
- surface treating
- surveys
- suspensions
- sustainable development
- sustainable transportation
- S waves
- swelling
- swelling soils
- system architecture
- system design
- systems analysis
T
- tables (data)
- tack coats
- taxation
- taxes
- taxi services
- tax receipts
- t beams
- teachers
- technical assistance
- technical drawings
- technical writing
- technological innovations
- technology
- technology assessment
- technology transfer
- teenage drivers
- telecommunications
- teleconferencing
- telephone equipment
- temperature
- temperature gradients
- tensile strength
- tension tests
- terrorism
- test facilities
- testing
- testing equipment
- test procedures
- tests
- test sections
- tests specific to a material
- test tracks
- test vehicles
- thaw
- theory
- thermal analysis
- thermal imagery
- thermal properties
- thermal stresses
- thickness
- three dimensional displays
- tie bars
- timber
- timber construction
- time
- time dependence
- time duration
- time series
- time series analysis
- tires
- tolerances (engineering)
- tolls
- ton miles
- tonnage
- tonnage ratings
- tornadoes
- torque
- tort liability
- tourism
- tourists
- towns
- track components
- tracking systems
- tractor trailer combinations
- trade
- trade routes
- traffic
- traffic analysis zones
- traffic assignment
- traffic calming
- traffic characteristics
- traffic citations
- traffic congestion
- traffic control
- traffic control centers
- traffic conviction
- traffic counts
- traffic crashes
- traffic data
- traffic delays
- traffic density
- traffic distribution
- traffic engineering
- traffic estimation
- traffic flow
- traffic forecasting
- traffic impacts
- traffic incidents
- traffic law enforcement
- traffic loads
- traffic management
- traffic measurement
- traffic mitigation
- traffic models
- traffic queuing
- traffic safety
- traffic safety education
- traffic signal controllers
- traffic signal control systems
- traffic signal intervals
- traffic signal preemption
- traffic signal priority
- traffic signals
- traffic signal timing
- traffic signs
- traffic simulation
- traffic speed
- traffic surveillance
- traffic violations
- traffic volume
- trailer on flat car
- trailers
- train crews
- training
- training programs
- training simulators
- transit buses
- transition point
- transit operating agencies
- transit operators
- transit oriented development
- transit personnel
- transit privileges
- transit riders
- transit safety
- transit traffic
- transit vehicle operations
- transmission lines
- transmissions
- transportation
- transportation careers
- transportation corridors
- transportation departments
- transportation disadvantaged persons
- transportation engineering
- transportation modes
- transportation operations
- transportation planning
- transportation policy
- transportation safety
- transverse reinforcement
- transverse stiffeners
- travel behavior
- travel costs
- travel demand
- travel demand management
- traveler information and communication systems
- travelers
- travel patterns
- travel surveys
- travel time
- travel time reliability
- trees
- trench backfill
- trend (statistics)
- trespassers
- trestles
- triaxial shear tests
- tribal government
- trip distribution
- trip generation
- trip length
- trip purpose
- trip tables
- truck crashes
- truck drivers
- trucking
- trucking safety
- truck lines
- truck routes
- trucks
- truck traffic
- trust (psychology)
- tubing
- turbidity
- turning lanes
- turnover
- two lane highways
- types of roads by jurisdiction
U
- ultra high performance concrete
- ultrasonics
- ultrasonic waves
- uncertainty
- underride guards
- underride override crashes
- unit costs
- unit hydrographs
- unit trains
- universities and colleges
- unpaved roads
- unsignalized intersections
- uplift pressure
- urban areas
- urban goods movement
- urban highways
- urban sprawl
- urban transit
- user charges
- user interfaces (computer science)
- utility poles
- utilization
V
- validation
- vanpools
- vans
- variable message signs
- variables
- variable speed limits
- vegetable oils
- vegetation
- vehicle design
- vehicle detectors
- vehicle dynamics
- vehicle fires
- vehicle fleets
- vehicle length
- vehicle miles of travel
- vehicle mix
- vehicle occupancy
- vehicle occupants
- vehicle performance
- vehicles
- vehicle safety
- vehicle sharing
- vehicle size
- vehicle spacing
- vehicle to infrastructure communications
- vehicle trajectories
- vehicle weight
- velocimeters
- vibration
- video
- video cameras
- video imaging detectors
- viscosity
- visibility
- visualization
- volume
- vortices
W
- wages
- walkability
- walking
- walkways
- warehouses
- warm mix paving mixtures
- warning signals
- warning signs
- warrants (traffic control devices)
- waste management
- waste products
- waste products (materials)
- wastewater
- water quality management
- water resources
- water transportation
- waterways
- waybill samples
- weather conditions
- web applications
- websites (information retrieval)
- weekdays
- weekends
- weigh in motion
- weigh stations
- welfare economics
- wetting
- wheat
- wildfires
- wildlife
- wildlife crossings
- wind
- wind resistant design
- winter
- winter maintenance
- wireless charging
- wood
- wooden bridges
- wood products
- wood structures
- wood ties
- workability
- work environment
- workforce development
- working conditions
- workshops
- work zones
- work zone safety
- work zone traffic control