Monday, September 30, 2013

Work on Liberty Lake Roundabout Wrapping Up

If you use the Liberty Lake I90 exit or entrance, chances are good that you've gotten tied up at some point in the wait caused by construction on a new roundabout at Mission and Harvard Roads.

Well, the Washington State Department of Transportation says hang on, because the wait is almost over and construction almost done.
 
Work is supposed to be complete within another week or so. And when it is, the roundabout is expected to smooth out traffic flow in the area.

With development on the rise in the area, that intersection has been a busy one and due to traffic volumes on Harvard, have traditionally had trouble turning either direction onto Harvard from Mission or the freeway exit. The roundabout will cut the wait time by eliminating the long lines by keeping traffic moving at the intersection.

Roundabouts offer advantages that signals and stop signs can’t:
  • Low travel speeds – Drivers must slow down and yield to traffic before entering a roundabout. Travel speeds in a roundabout are typically between 15 and 20 miles per hour.
  • No light to beat – Roundabouts are designed to promote a continuous, circular flow of traffic. Drivers need only yield to traffic before entering a roundabout; if there is no traffic in the roundabout, drivers are not required to stop. Because traffic is constantly flowing through the intersection, drivers don't have the incentive to speed up to try and "beat the light," like they might at a traditional intersection.
  • One-way travel – Roads entering a roundabout are gently curved to direct drivers into the intersection and help them travel counterclockwise around the roundabout.
  • Conserved fuel, reduced emissions – According to a study by the Insurance Institute for Highway Safety, intersections converted to roundabouts can reduce delays up to 62-74 percent, cut fuel consumption up to 235,000 gallons per year and cause fewer emissions and pollutants to be released into the atmosphere.
Drivers who are unfamiliar with roundabouts can learn more about them on the WSDOT YouTube channel.

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About SRTC

SRTC is the federally designated Metropolitan Planning Organization (MPO) for Spokane County. Urbanized areas with populations exceeding 50,000 people are required to have an MPO. SRTC was formed to address the county's transportation planning needs. It provides coordination in planning between the public, cities, small towns, the county, the state, transit providers, and tribes.

SRTC offers services including transportation monitoring, transportation modeling, census information analysis, travel demand forecasting, historical traffic count analysis, geographic information systems, and trip generation rates.