Advanced infrastructure-based detection technologies, such as infrared thermal imaging sensors, light detection and ranging (LiDAR), and radar, have the potential to improve vulnerable road user detection and vulnerable road user volumetric data collected at real world intersections and midblock crossings. The current study sought to evaluate the strengths and weaknesses of two of these types of sensors. The research team evaluated infrared thermal imaging sensors and LiDAR sensors and then compared the two sensor types.

This report may be of interest to State and local transportation agencies when planning to implement infrastructure-based vulnerable road user detection technologies at intersections and midblock crossings to reduce injuries and fatalities involving vulnerable road users.

Recommended citation: Federal Highway Administration, Enhancing Vulnerable Road User Detection and Volumetric Data Through Advanced Infrastructure Detection Technologies (Washington, DC: 2025) https://doi.org/10.21949/1521784