TSI’s extensive knowledge of traffic design engineering serves our institutional, commercial, and residential developer clients in planning, designing, permitting and construction management of on and off-site roadway improvements. TSI’s design staff develops plans and specifications for traffic signals, roundabouts, intersection channelization improvements, sign installations, pavement marking projects and street illumination systems. Other capabilities include traffic control plan development, traffic calming design, cost estimating, and traffic related construction management services.
- Channelization
- Traffic Signals
- Roundabouts
- Roadway Illumination
- Traffic Calming
- Site Access and Circulation
- Parking Lot and Garage Layout
Projects
- 31st Avenue S Traffic Calming Seattle
- 32nd/D Avenue Roundabout Anacortes
- Big Rock Roundabout Mt. Vernon
- Complete Streets Study Issaquah, WA
- Maple Valley SR 516 RRFB Maple Valley
- Ruston Roundabouts & Roadway Designs Ruston
- SR 20 Intersection Design Anacortes
- SR 538 Channelization Skagit County