Traffic alerts have been issued for the Saw Mill River Parkway and the Tappan Zee Bridge.

Work is underway to replace two bridges in Pleasantville.

Officials say the parkway will be closed from Exit 27 to the Grant Street intersection during the overnight hours on weeknights until 6 a.m. The closures will be in effect until July 1.

Commuters can also expect some midday traffic this week because of construction on the Tappan Zee Bridge. Officials say the northbound side of the Thruway near Exit 9 and the southbound lanes near Exit 11, will be closed today through Thursday.