Traffic is growing on highways from Bridgeport into New York as drivers make the journey into New York on the first workday since the derailment on Friday.
Expect heavy congestion on Interstate 95 and the Merritt Parkway.
Over the weekend Gov. Dannel Malloy warned that should all 30,000 affected commuters take to the highways to get to work, "we would literally have a parking lot."
If a substantial number of affected consumers hit the roads, traffic will be "greatly slowed," he said.
"If you are going to New York and you get to New York or you're transporting yourself to New York you may decide that perhaps you should stay there for the duration of this disturbance," Malloy said.
State police have added two state troopers on highways for the morning commute.