As part of the Marquette Road (STH 35) Wisconsin DOT major reconstruction project, three new roundabouts are being installed at the intersections of Iowa Street, Wisconsin Street, and Blackhawk Avenue. The roundabouts are being closely coordinated with the nearby rail line with special signing and signals. Several informational animation and traffic simulation videos were developed to acquaint road users with navigating and understanding the roundabouts.
This video animation gives a general overview of the three roundabouts including standard signage, markings, and operations for modern roundabouts. When needed, the traffic near the roundabouts is coordinated with the nearby rail line with special signing and signals, although during this video no train crossing events actually occur.
This video animation gives a focused drive through of the three roundabouts with a railroad train crossing event and special overhead changeable message signs on Marquette Rd. at Wisconsin St. and Blackhawk Ave. for the northbound left turn lane at these two intersections. The special overhead blank-out sign is a multiple message sign that warns of a train on tracks, and no left turn restriction for the northbound left turn lane, if appropriate as traffic conditions dictate.
This video animation gives a focused view of how traffic traveling eastbound on Iowa Street interacts with an active rail crossing and the roundabout. Special traffic signals at the railroad crossing, called Queue Cutters, hold and release traffic in intervals after a train has just passed. This allows traffic at the roundabout to move more smoothly and increases safety at the railroad crossing for motorists, so vehicles don’t block the railroad tracks.
More information on the Marquette Road Project and roundabouts in general can be found at the City of Prairie du Chien’s and the WisDOT websites.