JOINT TRANSPORTATION RESEARCH PROGRAMThe Joint Transportation Research Program serves as a vehicle for INDOT collaboration with higher education institutions and industry in Indiana to facilitate innovation that results in continuous improvement in the planning, design, construction, operation, management and economic efficiency of the Indiana transportation infrastructure. Abstract Autonomous vehicle (AV) and connected vehicle (CV) technologies are rapidly maturing and the timeline for their wider deployment is currently uncertain. These technologies are expected to have a number of significant societal benefits: traffic safety, improved mobility, improved road efficiency, reduced cost of congestion, reduced energy use, and reduced fuel emissions. State and local transportation agencies need to understand what this means for them and what they need to do now and in the next few years to prepare for the AV/CV future. In this context, the objectives of this research are as follows:1. Synthesize the existing state of practice and how other state agencies are addressing the pending transition to AV/CV environment 2. Estimate the impacts of AV/CV environment within the context of (a) traffic operations-impact of headway distribution and traffic signal coordination; (b) traffic control devices; (c) roadway safety in terms of intersection crashes 3. Provide a strategic roadmap for INDOT in preparing for and responding to potential issues This research is divided into two parts. The first part is a synthesis study of existing state of practice in the AV/CV context by conducting an extensive literature review and interviews with other transportation agencies. Based on this, we develop a roadmap for INDOT and similar agencies clearly delineating how they should invest in AV/CV technologies in the short, medium, and long term. The second part assesses the impacts of AV/CVs on mobility and safety via modeling in microsimulation software Vissim. 17.

No abstract

No abstract

In recent decades, several agencies have implemented tolls on their highway, bridge, or tunnel infrastructure for purposes that include mitigation and revenue generation. The Indiana Department of Transportation (INDOT) sought to investigate the feasibility of time-of-day tolling at a specific section of Indiana's highways, and therefore commissioned this research study. Recognizing that traditional ex ante methods of tolling evaluation such as surveys and public hearings are time intensive and costly, this project developed a simulation package to measure the expected impacts of TOD tolling in terms of revenue, travel delay, and welfare. The report developed an analytical model and accompanying software tool (a TOD tolling analysis pack) to capture the relationship between the time-of-day toll and route choice, and to evaluate quickly, the impacts of various TOD tolling scenarios. The research products help the analyst to easily visualize traffic flows on roadways and to estimate the revenue, monetary savings, travel times, speeds, vehicle hours of travel, vehicle miles of travel, and welfare in response to different scenarios. The TOD tolling analysis pack reduces drastically, the time and effort in evaluating proposed TOD tolling initiatives for the future. The visualization features illustrate traffic diversions due to tolling implementation and display the most impacted road segments. Further, the TOD tolling analysis pack can be integrated seamlessly with INDOT's existing TransCAD models and with Google Maps to provide users with the capability of acquiring additional pertinent information on the study area.