Juneau transportation plan highlights

Posted: Monday, July 16, 2001


The city's plan recommends a series of Egan Drive interchanges between the Mendenhall River and downtown that would replace traffic signals and make Egan Drive a "free-flow" expressway. The main road would go above or below the intersecting routes. The preferred conceptual design, a diamond interchange, would rely on a single exit ramp in each direction that ends at a standard intersection regulated by stop signs, a traffic signal or a roundabout.

Transportation demand management:

The transportation plan calls for policies to reduce driver-only trips and promote alternative methods of travel such as buses, carpooling and bicycling. Some ideas include flexible work hours, telecommuting, park-and-ride facilities, more bus service, transit subsidies for employees, more sidewalks and multi-use pathways.

Egan Drive traffic:

The plan compares existing Egan Drive traffic during peak hours with future projections.

Highest current volume on Egan Drive: 2,200 vehicles per hour.

Existing capacity: 2,000 to 2,500 vehicles per hour.

Highest volumes forecast for 2020: 2,900 vehicles per hour.

Capacity for three travel lanes with traffic signals: 3,200 to 3,400 vehicles per hour.

Capacity for interchanges and two lanes in each direction: 4,500 to 4,800 vehicles per hour.

If volume exceeds capacity and traffic signals stay in place, delays would occur. Drivers would slow and stop before reaching the signal and would wait two more signal cycles before clearing the intersection.

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