The state is planning a major road reconstruction of the perpetually congested area near Route 20 and McLean Boulevard in Elgin. Planning is under way for a $53.9 million project that would convert the diamond-shaped intersection with two stoplights to a “single-point urban interchange,” where only one traffic signal under the Route 20 overpass is necessary to control traffic from off…

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What’s in the works for Route 20 and McLean