Exit 4 of the Maine Turnpike, the fourth-busiest on the turnpike, is being rebuilt.

The $7.5 million project is part of an ongoing $135 million widening of the southern part of the highway from four to six lanes, reports the Portland Press Herald.
The turnpike has not been updated since the highway was built 55 years ago. The project is supposed to be finished in late fall of 2003.
The project involves making the curves on the ramps more gradual; lengthening acceleration and deceleration lanes; building a concrete barrier between the exit and entrance ramps; and adding breakdown lanes on the ramps.
Because the new ramps are being built around the outside of the ones they will replace, the traffic disruption will be minimal.