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Driver Services is responsible for determining driver fitness to safely operate a motor vehicle, and for the approval and issuance of handicap placards. Wyoming titles and lien filings are processed through the local county clerk office in the county seat of the county of residence. WYDOT works extensively with numerous partners in the private sector to improve and maintain the state's transportation infrastructure, sponsoring millions of dollars of work annually.
This section of WYDOT's Web site contains a range of useful information and links for contractors, consultants, vendors and others interested in doing business with WYDOT. WYDOT engineers and technical support staff perform a wide range of tasks in the course of maintaining and improving Wyoming’s transportation infrastructure. Engineering processes are also integral to WYDOT’s environmental services, geology, highway safety, photo and surveys, right of way, materials and testing laboratory and other programs. From engineers who design and supervise road construction, to snowplow drivers who keep those roads safe, to troopers who serve and protect highway users, to planners who help communities obtain funding for airport improvements, WYDOT is committed to building a better transportation system for the traveling public. Snow Snakes are wire frames covered with a continuous extruded plastic fabric and aptly named for their reptilian appearance.
Also included are notices about surplus equipment and property to be sold by the department, as well as information about training opportunities and speciality certifications. At headquarters in Cheyenne and numerous field offices across the state, engineers and technicians oversee development of plans and specifications for improvement plans for highways, bridges and related infrastructure.
In the field, resident engineering crews supervise actual construction, typically hundreds of projects annually worth hundreds of millions of dollars. But as a full-service transportation provider, the agency has numerous other responsibilities. Recently, infrasonic avalanche monitoring technology has been developed for practical use near Teton Pass, WY to provide another tool for Wyoming State Highway 22 technicians in their operational forecasting and decision making. Engineering and technical expertise is also used for ongoing maintenance efforts after construction is completed.
The technology detects low frequency sound waves produced by avalanches with automated near real-time processing provided to facilitate an alarm. Monitoring system operation provides information to confirm results from avalanche control work, notification of natural avalanche events, and verification of explosive detonations. The ability to monitor avalanche activity in poor visibility and confirm avalanche control work results are powerful tools for assessing highway avalanche hazard and has changed the way WYDOT operates in its mission to provide a safe and efficient transportation route. During the December 31, 2007 to February 6, 2008 observation period, Snow Snakes trapped and prevented approximately 622 tons of snow from potentially interacting with the roadway surface to form slush and ice.
In Wyoming, the concern has prompted the Wyoming Department of Transportation to construct an experimental wildlife detection and driver warning system at Trappera€™s Point, north of the town of Pinedale on US Highway 191.
The focus of this thesis is two-fold: to develop a framework to determine whether the driver warning system is effective at modifying driver behavior and to develop a framework to determine whether the wildlife detection system reliably detects the presence wildlife on the roadside. Transportation agencies have attempted to solve the deer-vehicle collision problem with a wide variety of solutions. Published literature was reviewed to analyze the effectiveness of these solutions with a spotlight on other active, wildlife-detecting driver warning systems. The system at Trappera€™s Point utilizes the Eagle Intrusion Detection System (EIDS), originally developed by Telonics, Inc for military applications. Seismic and passive infrared sensors are designed to detect the presence of wildlife and trigger the flashing lights atop six signs that read a€?DEER ON ROAD WHEN FLASHINGa€?. Many difficulties with the wildlife detection system and data collection equipment were experienced during this study.
This report describes these problems in detail and analyzes the system using three measures of effectiveness: accurate detection of wildlife, changes in driver behavior, and crash reduction.
Any extension of the service life of concrete through remediation can result in significant cost savings to Wyoming Department of Transportation (WYDOT).
Also, materials and pavement engineers need methods to evaluate damage and rates of deterioration to help assess the life cycle of ASR-affected concrete. The report strives, first, to guide and assist smaller agencies by implementing asset and pavement management principles and, second, to encourage and facilitate the development of gravel roads management software.
The overall effort required to implement a gravel roads management system (GRMS) for local agencies must be minimal.
Volume 1 outlines the Background, Problem Statement, Objectives, Report Organization, Analytical Methods, and Summary and Conclusions. Volume 2: Implementation Guide is designed to assist local road and street departments with implementation or improvement of a gravel roads management system. It is written primarily for road managers tasked with acquiring the necessary information to develop an information systems process. Volume 3: Programming Guide is intended to assist programmers and database managers with programming the information needed to implement a gravel roads management system.
Equally difficult is for law enforcement agencies to enforce and cite someone going too fast for conditions.
In many cases, drivers are cited for going too fast for conditions only after the accident has occurred. Variable speed limits (VSL) are one type of intelligent transportation system (ITS) that has shown promise for improving safety on roadways subject to adverse conditions.
The purpose of this research was to lay the foundation for the new I-80 VSL system in southeastern Wyoming. During this phase of the research, surveys were sent out to all DOTs to see what VSLs have been implemented in the U.S. Driver speed behaviors during both a€?ideala€? and a€?non-ideala€? conditions were found and baseline speeds determined. To check how cars and trucks are reacting to the VSL system individual speed analysis was done.
A draft version of control strategy was designed and a simulation was run to check for level of speed compliance.
The high winds are problematic in many ways including, interfering with the performance of the transportation system, blowing vehicles off the road, or even overturning high profile trucks, which can cause economic losses and safety concerns for road users. The primary objectives of this research involve two parts: First, develop a statistical model that reveals the correlation between likelihood of overturning trucks and the weather conditions.
Second, use the result of the statistical model to develop a data driven operation plan for Wyoming Department of Transportation (WYDOT) to use in the winter season at a hazardous high wind corridor to improve truck safety.

Pathway Services has offered to provide measurements on test sections in Wyoming since they had not collected such data for any other states, so it was important to them to determine the limitations or potential of the system. A 13-mile section of Highway 30 in southwest Wyoming has been especially problematic with an average of 130 mule deer killed each year WYDOT installed at total of seven underpasses along this area. Through three years of monitoring the study documented 49,146 mule deer moving through the underpasses.
Overall, the construction of seven underpasses and game-proof fencing reduced deer-vehicle collisions by 81 percent.
The results suggest that underpasses, combined with game-proof fencing, can provide safe and effective movement corridors for mule deer and other wildlife species while improving highway safety for motorists. Determining whether a research program is pursuing relevant research projects and obtaining results for the sponsoring organization has been a challenge in the past. This report will present a methodology for conducting an evaluation of a research program within a transportation agency. The methodology provides ten performance measures that are used to summarize the findings of the evaluation.
These performance measures are quantifiable, meaning they are designed to place a score or value on the accomplishments of the research program which can then be used to make managerial decisions for the research program.
The developed methodology was implemented for the Wyoming Department of Transportationa€™s Research Program to demonstrate how the methodology can be utilized. Specific recommendations and conclusions for the WYDOT Research Program are presented in the final chapter of this report. Final recommendations for implementing the methodology for any other agency looking to perform an evaluation of their research program are also presented in the final chapter of this report. The purpose of this report is to present the Wyoming Department of Transportation with information in order to alter, improve, and incorporate changes to their standard road and bridge specifications. Research included in this study synthesizes AASHTO, ASTM, State DOT, and NCHRP literature among other technical documentation, as well as State DOT surveys that outline important considerations for culvert design. Additional areas of research discussed in this report include post-installation inspection of pipe culverts and LRFD culvert design procedures. The report concludes with recommendations for changes to WYDOTa€™s specifications related to selection, design, installation, and inspection of culverts. The Online Guide to Luminaire Supports is one of six online guides maintained by the AASHTO-AGC-ARTBA Joint Committee on New Highway Materials Task Force 13 (TF13). The Concrete Prism Test (CPT) and large scale field blocks provided the most accurate data. STATEWIDE MESOSCOPIC TRAFFIC SIMULATION FOR WYOMING FHWA 1305F RS06210 This study developed a mesoscopic simulator which is capable of representing both city-level and statewide roadway networks. The key feature of such models are the integration of (i) a traffic flow model which is efficient enough to scale to large regions, while realistic enough to represent traffic dynamics, including queue growth and dissipation and intersection control; and (ii) a user behavior model in which drivers choose routes based on minimizing travel times.
Integrating these models is nontrivial, because route choices depend on route travel times, but route travel times are determined from route choices through the traffic flow model.
An iterative approach is used to seek a consistent solution to this problem, using the cell transmission model as the traffic flow model. These features have been implemented in a software program, for which source code and tutorials have been provided as appendices to this report. Additional modules are provided for generating graphical views of networks, performing warrant analysis based on MUTCD procedures (either to assist with network creation, or as a post processing step), and a spreadsheet interface to the program itself. Ready-to-use networks have been provided representing the city of Casper and the State of Wyoming. A dynamic simulation model is validated and tested by researching 50 historical projects, collecting data about these projects, and validating the key inputs for the simulation.
A variety of parametric studies, including simulating the effects of various revenue scenarios, are performed and conclusive results are reached. Both Core Strategies, focusing on how to load and manage the project pipeline, and System and Organizational Improvement Strategies are identified. By implementing these strategies and minimizing the amount of projects held a€?on the shelfa€? and employing practices that minimize the risks of incurring Holding Costs due to revenue shortfalls, savings can be maximized. Applying new strategies and improving processes will allow the department to better manage the risks facing transportation projects in the project pipeline. Estimated cost savings are between 2 and 4 percent of the total budget; this would amount to a total savings of 90 million dollars, for a budget of 3 billion dollars over a ten-year period. The results of the research are enabling WYDOT to maximize the performance benefits from their asset management efforts.
Limited resources and lack of coordination across jurisdictions has made it difficult for Native American communities to address their roadway safety concerns.
The rural nature of many of their roadways and lack of crash data has also made it difficult for Tribes to implement an effective safety improvement program. A methodology that is able to address these challenges is presented in this report to assist Tribes in reducing fatal and injury crashes.
The proposed methodology has been implemented successfully in the Wind River Indian Reservation. Key to the success of such a process is collaboration among safety stakeholders, namely the State departments of transportation, Tribal leadership, Local Technical Assistance Program (LTAP), Tribal Technical Assistance Program (TTAP), Bureau of Indian Affairs (BIA), and local and Tribal law enforcement.
We captured 40 mule deer and fitted them with global positioning system (GPS) collars that collected locations every two hours for up to two years. We identified areas of high seasonal (summer and winter) use by mule deer as well as migration routes between these seasonal ranges. Results show that mule deer use the developed valley of Jackson Hole intensively in the winter months and during migrations. Results of a resource selection function analysis on winter habitat use indicate that deer most intensively use areas close to supplemental feed sites, hill slopes, and areas with high cover of herbaceous vegetation, golf courses, mixed trees, junipers, and riparian vegetation. Road crossings almost all occurred during winter (rather than summer or migration times) and were concentrated in a few locations. Road crossings were negatively associated with roadside fencing and positively associated with proximity to preferred winter habitat.
These results suggest that any measures designed to reduce the frequency of deer-vehicle collisions will have to allow deer to cross major roadways frequently as they move around their winter home ranges. Crossing structures, which are effective for allowing migrating ungulates to cross roadways, may not be effective for facilitating the frequent crossings of non-migrating animals in a highly developed landscape.

Maintaining the roadways can involve rehabilitation in the form of widening; which require a longitudinal joint between the existing and new pavement sections to accommodate the wider travel lanes, additional travel lanes or modification to shoulder widths. Several methods are utilized for the joint construction between the existing and new pavement sections; vertical, tapered and stepped joints. The main purpose of this research is to develop a formal recommendation as to the preferred joint construction method that provides better pavement support in the State of Wyoming. Field data collection of Dynamic Cone Penetrometer (DCP), Falling Weight Deflectometer (FWD), base samples for gradation and moisture content were conducted on 28 existing and 4 newly constructed widening projects. Survey of practices and preferences of other states, and constructability issues were undertaken. Results of the analysis indicate that the tapered joint technique showed relatively better pavement strength compared to the vertical joint type, and could be the preferred joint construction method.
The goal of this research was to help develop a new methodology for incorporating travel times calculated from intelligent transportation system (ITS) technology into Wyominga€™s road and weather condition reporting system.
Bluetooth sensors and speed sensors were used to measure travel times on I-80 between Cheyenne and Laramie, as well as WY-28 between Farson and Lander in Wyoming. Travel times from the WY-28 corridor were then calculated to determine if this trend was common with other rural highways.
The next step in this research was to determine the best way to measure travel times on a rural corridor. This travel time index was then modeled with weather variables downloaded from road weather information system (RWIS) stations. Finally, a methodology for implementing and evaluating this new travel time reporting procedure was developed. The results of this research will help to improve the current condition reporting system by incorporating both physical conditions (slick in spots, high wind speed, etc.) with travel times. This will help all types of travelers to more accurately quantify the severity of traveling conditions. Settlement of bridge approach slabs and their supporting backfill has been experienced by more than ten Departments of Transportation throughout the United States.
According to current Wyoming Department of Transportation inspection reports, bridge approach slab settlements occurred not only on existing bridges but also on newly built bridges that were just opened to traffic.
These settlements typically create voids ranging from 6-in to 12-in between the base of the approach slab and the geotextile reinforced backfill. This research presents factors causing bridge approach slab settlements and provides necessary design and construction recommendations. A comprehensive literature review pertaining to approach slabs was performed to examine outcomes of research conducted by 12 states.
The current specifications and standards on bridge approach slabs of the corresponding statesa€™ Departments of Transportation were also evaluated. A nationwide survey was conducted to fill in the missing knowledge identified in the literature review.
The results of the survey are categorized in three groups based on the percentage of bridges experiencing approach slab settlements in that state. Results of the survey show that 46 percent of the total 28 respondents are not satisfied with their current approach slab designs. The survey results revealed that the most common cause of approach slab settlement is poor construction practices.
The most important finding of the survey is that performing in-situ tests to control backfill compaction reduces the amount of approach slab settlement. Using the lessons learned from the literature and the results of the survey, potential amendments to current Wyoming Department of Transportation design and construction manuals are recommended. According to the Federal Highway Administration, 53 percent of annual fatal crashes are attributed to lane and road departures. In Wyoming, lane departure crashes comprised 72 percent of all sever crashes for the years 2008 a€“ 2010. While lane departure crashes are mostly driven by driversa€? errors, reduction of the frequency and severity can be achieved by more forgiving roadside and specific countermeasures. Although the advantages of rumble strips were generally found to outweigh the disadvantages, several issues and concerns have been identified regarding the implementation of rumble strips; noise, maintenance, and the adverse effects on bicyclists and motorcyclists are among the most recognized concerns. This study demonstrated that despite the fact that rumble strips have been used for many years, there are no standardized practices used in the U.S.
A significant number of states are still working on updating their rumble strips policies; their main goal is to enhance motor vehicle safety while accommodating all road users to the highest practical extent.
The information provided in this report and the companion Expert System that was developed as part of this study may provide the necessary background for WYDOT and other transportation agencies when it comes to updating or developing an effective all road usersa€? friendly rumble strips policy. We evaluated reflector effectiveness in terms of their ability to reduce deer-vehicle collisions and modify deer road-crossing behavior. Using a series of experimental manipulations of reflectors, we showed that reflectors reduced deer-vehicle collisions by 32 percent and significantly reduced the number of high-risk deer road crossings (those in which deer ran into the road as a car was approaching). However, covering reflectors with white canvas bags a€“ initially done with the intent of creating a control treatment that neutralized the reflectors a€“ proved even more effective than leaving the reflectors exposed.
White bags on posts resulted in 33 percent fewer collisions than when reflectors were exposed and significantly reduced the number of high-risk deer road crossings.
It is likely that the white bags are more visible or reflective to deer than the red wildlife warning reflectors. A cost-benefit analysis suggests that the benefits of reflectors outweigh their initial materials and installation costs, but may not outweigh the net costs once maintenance is taken into account.
Analysis of patterns of deer-vehicle collisions across the state showed that traffic volume, proximity to agricultural land, proximity to deer winter range and migration routes, and high speed limits are all strongly associated with high collision rates. On average, areas with a 55 mph speed limit have 36 percent and 55 percent fewer deer-vehicle collisions than areas with speed limits of 65 and 75 mph, respectively.
Reducing nighttime speed limits in high collision areas may be a cost-effective strategy for mitigating deer-vehicle collisions in Wyoming.

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