The Louisiana Department of Transportation and Development (DOTD) is proposing to construct two roundabouts on LA 75 at the existing intersections of LA 75 and Enterprise Boulevard and LA 75 and Walmart Drive in Iberville Parish. The existing 5-lane LA 75 consists of two 12-foot westbound travel lanes, two 12-foot eastbound travel lanes, and one 12-foot center turn lane.
The proposed new intersection of LA 75 and Enterprise Boulevard would consist of the construction of a four leg, one-lane roundabout with an inscribed diameter of 151-feet and would feature a 20-foot circulating lane, a 12-foot concrete apron, and an 82-foot center island.
The proposed new intersection of LA 75 and Walmart Drive would consist of the construction of a four leg, one-lane roundabout with an inscribed diameter of 110-foot and would feature a 19-foot circulating lane, a 21.5-foot concrete apron, and a 24-foot center island.
LA 75 would remain open and the proposed roundabouts would be constructed under traffic. Additional right-of-way would be required to construct the roundabouts.
A well-designed roundabout can improve safety, operations, and aesthetics of an intersection. Greater safety is achieved primarily by slower speeds and the elimination of more severe crashes and operation is improved by smooth-flowing traffic with less stop-and-go than a signalized intersection. Aesthetics are enhanced by the opportunity for more landscaping and less pavement.
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