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This study compares the performance of left-turn phasing to provide quantifiable benefits of one phasing over another. From the analysis, guidelines are developed for determining the type of left-turn phasing based on left-turn volume, opposing through volume and lane geometry.
This study examined LTL carriers in the mountain-plains region of North Dakota, South Dakota, Montana, and Wyoming. Many rural communities rely on the LTL industry for freight movements in and out of the region. The level of LTL service in the mountain-plains region is unknown in a post regulated environment.
North Dakota has more than 102,000 miles of rural roads. Approximately half of these roads are paved and the rest are gravel or dirt. Due to limitations in funding and shifts in traffic patterns, counties and townships are forced to make difficult decisions regarding the maintenance of their roads. Some...
This paper presents a prototype safety improvement program (SIP), which was developed specifically for unpaved roads. The combination of high mileage, low traffic volume, and limited budgets make it difficult for local agencies to adopt traditional safety improvement programs. The SIP for unpaved roads...
Some North Dakota counties are facing a shortage in quality gravel. Other counties may experience the same problem in the near future. Gravel pits in the state are scarce and counties consume substantial amounts of gravel for a large portion of their roads. Obtaining gravel from distant sources leaves...
This report develops a baseline inventory of rail hazardous commodities that originate in, terminate in, or pass through Region 8 (which includes the states of Colorado, Montana, North Dakota, South Dakota, Utah and Wyoming). The inventory also includes a set of interregional tables that summarize hazardous...
Transportation fulfills three major roles in a developed economy. First, it is an enabler that allows an economy to develop. Second, it is a facilitator of competition for producers throughout broad area. And finally, transportation is a component of the Gross National Product. The motor carrier industry...
The primary objective of this research was to establish statistically valid mathematical models that can explain the variations in accidents as a function of geometric variables. Engineers and planners will be able to use these models to examine the sensitivity of accident rates to any of the independent...
This paper examines the effectiveness of applying chip seal friction courses in reducing accidents on low volume, rural roads. Chip sealing data from District 3 of the Utah Department of Transportation were used to examine accident rates before and after applying chip seal. Although accident rates generally...
In this research, criteria were developed for designating and evaluating scenic loop tours based on roadway conditions, scenic beauty, number of local communities, population, and anchor attractions. Two existing scenic loop tours in Wyoming -- the Cheyenne and Oregon Trail Loop Tour and the Bighorns...