The Nashville Department of Transportation and Multimodal Infrastructure Traffic Management Center is currently working on a signal retiming project to enhance traffic flow and pedestrian safety through signal retiming and implementation of leading pedestrian intervals (LPIs) across 336 intersections.
The project includes new signal timing plans for five corridors and enhanced pedestrian safety through leading pedestrian intervals (LPI) implementation. LPIs have been proven to reduce pedestrian-vehicle crashes at intersections by 13 percent by providing the following benefits:
- Reduced conflicts between pedestrians and turning vehicles.
- Increased compliance by motorists yielding to pedestrians.
- Enhanced protection for pedestrians with slower mobility.
The new signal timing plans will also optimize vehicular efficiency by improving signal coordination. By collecting data movements across various times of the day, NDOT can ensure drivers receive more consecutive green lights along corridors for smoother traffic flow
Project locations: Downtown, Nolensville Pike, Dickerson Pike, Gallatin Pike, Lebanon Pike and Donelson Pike.
Project Phases and Timeline
Phase I
- Develop new signal timing plans for five corridors: Downtown, Nolensville Pike, Dickerson Pike, Hermitage and Donelson Pike.
- Completion Deadline: April 2024
Phase II
- Conduct inventory analysis to identify intersections requiring additional infrastructure for LPI deployment.
- Completion Deadline: January 6, 2024
- Phase II: Leading Pedestrian Interval (LPI) Inventory Assessment
Phase III
- Procure and install required equipment for LPI implementation at targeted intersections.
- Deploy LPIs at targeted intersections.
- Status: In Progress
Downtown Signal Timing Project
The Nashville Department of Transportation and Multimodal Infrastructure (NDOT) implementing Leading Pedestrian Intervals (LPI) and signal timing enhancements in the downtown area. These changes aim to optimize signal timings for 108 intersections in Downtown Nashville in accordance with the Vision Zero Implementation Plan and Connect Downtown Action Plan and provide a safer experience for people walking.
The signal timing updates will be deployed over a two-month period in sections of 20 signals at a time to allow engineering staff to make observations and field changes based on early feedback. These improvements are designed to benefit everyone using our roads, ultimately enhancing downtown travel conditions.
A protected left-turn phase was removed from 67 traffic signals to implement a Leading Pedestrian Interval (LPI). The department is currently assessing each intersection and will make adjustments as needed.
- Downtown Signal Timing Locations List
- Downtown Signal Timing Zones Map
- Report Traffic Light Timing Issues
Completed Leading Pedestrian Interval (LPI) Deployments
Leading Pedestrian Interval (LPI) has been successfully deployed at the following intersections:
- Lebanon Pike and Disspayne Drive
- Lebanon Pike and JB Estille Drive
- Lebanon Pike and Graylynn Drive
- Lebanon Pike and Jacksonian/Juarez Drives
- Lebanon Pike and State Route 45/Old Hickory Blvd.
- Robinson Road at Merritt Street
- Robinson Road at Piggly Wiggly