• FLASH on US 29 will provide upgraded, frequent, and reliable service between Downtown Silver Spring and Burtonsville along the US 29 (Colesville Road) corridor.
  • The project is currently in the construction phase and is scheduled to begin operations in 2020.
  • The FLASH on US 29 Groundbreaking Ceremony was held on October 25, 2018 in Briggs Chaney.


The Montgomery County Department of Transportation (MCDOT) is constructing a new transit line, called FLASH, along US 29 (Colesville Rd). FLASH is a bus-based rapid transit system with features that improve reliability, so you can get where you need to go quickly. US 29 FLASH will operate between Burtonsville and Silver Spring and open in 2020.

US 29 FLASH will:

  • Use existing bus-on-shoulder lanes on US 29 in the northern section of the corridor.
  • Operate in mixed traffic in the southern section of US 29 and along Lockwood Drive, Stewart Lane, Briggs Chaney Road, and Castle Boulevard.

Service plans include:

  • Running every 7.5 minutes during the peak period  (AM and PM rush hours) and every 15 minutes during the off-peak.
  • Span of service from 5 am to midnight, 7 days/week.
  • Transit signal priority installed at 15 intersections along the corridor to provide traffic signal benefits to BRT vehicles where appropriate, reducing travel time and increasing reliability.
    Service plans are subject to change. 


FLASH features and amenities include:

  • Frequent, reliable service
  • New, enhanced vehicles are equipped with WiFi and USB ports and accommodate bicycles onboard
  • New, comfortable stations provide weather protection, pre-payment stations, and real-time transit information (via message boards)
  • Community-friendly design provides enhanced pedestrian walkways, bike facilities and bikeshare stations
  • Level boarding allows for easy on, easy off

Additional project information:



To get involved and stay informed about the project, you can:

RELIABLE Frequent service, dedicated lanes, and green light priority signaling keep FLASH vehicles moving.

EFFICIENT One FLASH vehicle can take up to 90 cars off the road, making our transportation network more efficient and your commute easier.

CLEAN FLASH reduces harmful greenhouse gas emissions, making our air cleaner.

COMFORTABLE New FLASH stations will feature real-time travel info and provide a place for you to wait comfortably and pay your fare before boarding.

COST-EFFECTIVE You can save money by riding FLASH instead of driving a car.