Safety and Cost Performance of Intersection Lighting

Abstract

This activity provided a better understanding of maintenance issues, cycles, and costs. Surveys were sent to both State Highway Agencies (SHAs) and communities in order to identify perceptions from SHAs and the public about lighting improvement. The community survey included questions such as public attitudes toward intersection lighting, effectiveness of lighting, and visibility and safety improvement. To quantify the safety effects of lighting at intersections, crash modification factors (CMFs) were developed by using two methodologies: before-and-after analysis and cross-sectional statistical analysis. The developed CMFs could be used to justify roadway lighting projects. Life cycle cost analysis Joint transportation research program

INDOT Research Program Benefit Cost Analysis—Return on Investment for Projects Completed in FY 2016

“…All FY 2017 completed projects were reviewed to determine if they were a viable candidate for BCA. Selection was based on 1) can the costs and benefits be quantified on outcomes that impact INDOT operations,2) what are the implementation costs, and 3) what is the expected impact time period?…”

“…The equivalent uniform annual cost for the initial investment and annual maintenance cost for an NDT program was calculated to be $924,000. 2 The current five year work plan for bridge deck repair is shown in the below table. Estimated savings are based on the simulated EUAC cost analysis performed by using an NDT inspection program.…”

Temporal Stability Analysis of Lighting Conditions in Traffic Accidents

“…The number of collisions between vehicles and other objects was about 1.9 times higher than in the daytime [4]. Accident data from the United States in 2014 also showed that fatal accidents at night accounted for about 50 percent of total fatal accidents, even though the number of vehicles during daytime is significantly higher than at night [5]. In addition, a report from International Commission on illumination indicated that accidents at night were about three times as frequent than during the day under insufficient environmental lighting conditions [6].…”