Eastern part of toll highway will link up with Route 1 in Prince George's County.
Paving will close interstate lanes overnights for up to four weeks.
A new phase starting Monday night will shift northbound traffic on Route 1 till fall.
The Potomac River doesn't divide transit thinkers from road builders.
Most commuter bus service will continue on the Intercounty Connector, but a route between College Park and the Germantown Transit Center will be scrapped Aug. 1 due to low ridership
Congestion may decrease as vacations season starts, but work zones are more active.
The Maryland Transportation Authority will increase the speed limit on the Intercounty Connector to 60 miles per hour from the current 55 mph limit. This new speed limit will become effective by March 31.
A Montgomery County Council member has asked transportation officials to halve tolls on the Intercounty Connector, saying lower tolls would attract more motorists to the highway.
Traffic remains light, but is increasing about 3 percent a month, the state said.