This document provides an overview of the Longitudinal Research on Aging Drivers (LongROAD) Study project. The study aims to understand how aging affects driving behavior and safety over time through a cohort study of 3,000 older drivers ages 65-79 across 5 sites in the US. Participants will be assessed annually for 2-3 years using questionnaires, health evaluations, and GPS devices in vehicles to collect driving data. The goals are to identify risk factors for older drivers and the effects of declining health on driving, and inform policies to support safe mobility among older populations. Enrollment is underway with over 1,200 participants providing over 4 million miles of driving data so far. Outcomes will include research publications analyzing the extensive longitudinal