Roundabout Construction Approaches - The Missourian: News

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Roundabout Construction Approaches

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Posted: Wednesday, May 23, 2012 11:00 am | Updated: 7:18 pm, Sat Jun 22, 2013.

The Main Street and Independence Drive intersection will be shut down next week as crews begin work to install a roundabout.

City Engineer Jonathan Zimmermann Monday night said construction will begin Tuesday, May 29.

He added that the intersection will be closed for about two months.

At roundabouts, vehicles travel counterclockwise around a raised center island, with entering traffic yielding the right of way to circulating traffic. Once there is a gap in traffic, drivers enter the circle and proceed to their exit. If there is no traffic in the roundabout they enter without yielding.

The traffic light will be removed from the intersection to provide a more continuous flow of traffic, Zimmermann said.

Zimmermann added that following the intersection work, the State Street and Independence Drive intersection will be permanently closed.

There will be a cul-de-sac installed on the west end of State Street, he noted.

The Main Street project is funded through the Surface Transportation Program (STP) and is an 80-20 cost-share, including a 20 percent local match and 80 percent federal match.

The scope includes a 2-inch asphalt overlay, concrete base repairs, new sidewalks and signs.

The Main Street project is the city’s largest street project since Church Street, and is similar to that project and the Washington Avenue project which have been completed in the past few years.

During construction, there will be improvements at the Old Highway 50 and Main Street intersection, which will be realigned.

In 2007, the East-West Gateway Council of Governments (EWGW) approved the Main Street improvements as part of its Transportation Improvement Program (TIP). The annual TIP outlines state, county and municipal transportation-related projects authorized for federal funding through EWGW.

Downtown Enhancement

The city also will receive separate federal funds for a downtown “enhancement” project.

Those plans call for “bump outs” to be installed at intersections between Washington Avenue and Linden. Bump outs are extended sidewalk and curb areas intended to provide drivers with a better line of sight for oncoming traffic.

Settled and cracked sidewalks will be replaced. There also will be stamped crosswalks, planters, benches and seating areas along the existing historic courthouse.

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