Traffic Engineering & ITS Consulting Services
Montgomery County, MD



  • Signal Timing Optimization
  • CBD Speed Limit Change
  • Transit Signal Priority
  • Bike Signal Operations Analysis


Featured Task: Signal Timing Optimization

SAI, a Mead & Hunt Company, prepared optimized timing plans for the County’s signal timing program on an annual basis from Fiscal Year ’15 through ‘19, including over 450 of the County’s 900 signals in grid networks, urban corridors, shopping areas, suburban commuter roadways and high-speed rural roadways in Gaithersburg, Wheaton, West Rockville, Germantown, Bethesda, North Bethesda, and Woodmont. Work included traffic data collection, the development of Synchro and SimTraffic models, field observations to identify critical intersections & roadways segments and  confirm time-space diagrams and coordination issues, change and clearance interval calculations, analysis of intersection operations including LOS, queues and delays, review of time-of-day plans, operational reviews and recommendations to improve efficiency and safety, development and implementation of optimized signal timing, Before and After travel time and delay studies, RITIS (INRIX probe data sets) travel time data analysis, and benefit analysis of the optimized timing plans. SAI, a Mead & Hunt Company, staff have read access to the County’s Siemens ATMS, and the MView video for operational reviews and database download.

2019 Sabra & Associates, Inc., a Mead & Hunt Company | All rights reserved | Employee Login | Contact us