what we do

Traffic Engineering

Developing safe and efficient transportation systems

Parametrix works with clients to improve traffic conditions and travel patterns to safely and efficiently move people and vehicles. This involves comprehensive analyses of existing and projected traffic conditions, traffic operations, intersection and traffic signal analyses and design, travel demand modeling and forecasting, and transportation demand management. Our traffic engineers are proficient in the use of current traffic modeling and analysis software including HCS, CUBE, SIDRA, Synchro, Sim Traffic, CORSIM, VISSIM, and VISUM.

Wheeler Site Redevelopment | Parametrix
​Wheeler Site Development 
​Olympia, Washington
Client: ​​​Wright Runstad & Company

This new data center and office complex was constructed on the Capitol Campus at the intersection of 14th and Jefferson streets. Parametrix studied different configurations for the intersection—signalized, unsignalized, and roundabout. A roundabout was chosen as the best method to mitigate impacts to the intersection. We used a detailed VISSIM microsimulation to illustrate the interaction with nearby signalized, metered intersections to determine the effects of queuing and weaving on nearby interstate on- and off-ramps.



  • Uptown Pedestrian Study | Parametrix

    Uptown Pedestrian Study

  • City Center Access Study | Parametrix

    City Center Access Study

  • Seattle Arena Transportation Study | Parametrix

    Seattle Arena Transportation Access & Parking Study

  • S Meridian Traffic | Parametrix

    South Meridian Traffic Analysis

  • Wheeler Site Redevelopment | Parametrix

    Wheeler Site Redevelopment