Transportation Safety Management

Transportation Safety Management Research Projects

SafeTREC research in progress

Explore our current research projects on transportation safety management.


Development and Implementation of Safety Performance Measures


Research Team:

Dr. Aditya Medury
Dr. Praveen Vayalamkuzhi
Sang Hyouk Oum
Dr. Offer Grembek
Camille Salem
Lin Yang

This project aims to develop a network screening tool for the California Department of Transportation (Caltrans). Safety performance functions (SPFs) will be developed and incorporated into the tool for network screening purposes to identify high crash concentration locations (HCCLs). Learn more.


Data Requirements for Safety Screening

Research Team:

Dr. Aditya Medury
Prof. Venky Shankar
Dr. Offer Grembek
Dr. Bor-Wen Tsai

The primary goal of this project was to assess knowledge gaps for the development of safety performance functions (SPFs) and supplement this information with a thorough review of additional data sources both within and outside of Caltrans. The objective was to develop a roadmap for a data collection plan to facilitate better SPF model estimation, which in turn facilitates better network screening. Learn more.


Pedestrian Hot Spots

Research Team:

Dr. Aditya Medury
Dr. Offer Grembek

Network screening techniques are widely used by state agencies to identify locations with high collision concentration, also referred to as hot spots. However, most of the research in this regard has focused on identifying highway segments that are of concern to automobile collisions. In comparison, pedestrian hot spot detection has typically focused on analyzing pedestrian crashes in specific locations, such as at/near intersections, mid-blocks, and/or other crossings, as opposed to long stretches of roadway. In this context, the efficiency of the some of the widely used network screening methods has not been tested. 

In order to address this issue, a dynamic programming-based hot spot identification approach is proposed which provides efficient hot spot definitions for pedestrian crashes. Learn more.


Bicycle Corridors

Research Team:

Dr. Aditya Medury
Dr. Offer Grembek

While spot safety approaches are effective and necessary, they address the safety problem in a reactive manner and on a very small scale. To complement spot identification methods, transportation safety practitioners have shown an increased interest in developing approaches that can also lead to the implementation of improvements in a proactive manner such as corridors. This research proposes a high-level specification for safety corridors, and studies the performance of three approaches to identify bicycle crash corridors. Learn more.