Boston-area highways are congested and expected to get worse as the hours until Thanksgiving and Hanukkah tick down, officials said.
The State Police have fully staffed their barracks in anticipation of accidents on busy, slick roadways, said Lieutenant Daniel Richards.
The biggest backups today were due to a jackknifed tractor trailer on Interstate 93 North at the Ted Williams Tunnel and a four-car crash on the Massachusetts Turnpike in Newton, he said. Other small delays have occurred in various places due to spinouts.
The Department of Transportation and State Police were able to clear the jackknifed trailer in just 25 minutes, Frank DePaola, administrator of the MassDOT highway division.
“We’ve been experiencing heavier than normal delays,” said DePaola. On Tuesday, traffic began to build around 2 p.m. and cleared around 8 p.m. DePaola expects a similar pattern today.
“We’re starting to see very long miles of congestion along the Turnpike,” said DePaola.
“Most of the traffic will be when people are getting out of work,” said Richards, who thinks the holiday is one of the worst traffic days of the year. “It’ll calm down once people are home and tucked in for Thanksgiving.”
DePaola advised travelers to hit the highways after 8 p.m., when traffic will be less congested.
At Logan International Airport, cancellations and delays have been scarce, said Massport spokesman Matthew Brelis.
“It’s going pretty smoothly,” he said. Cape Air has canceled numerous flights out of Logan due to the weather, according to the Massport website.
Cape Air expected delays today and decided to cancel all flights in the Northeast Tuesday evening, said spokeswoman Trish Lorino.
To accommodate fliers, the airline added five roundtrip flights from Boston to Nantucket and 10 roundtrip flights from Hyannis to Nantucket Thursday, Lorino said.
The airline is running on schedule as of this afternoon and expects to run without delays through the holiday, Lorino said.
Flight cancellations from around the country can be checked here.
Earlier this morning, Amtrak was experiencing delays between New Haven and Boston due to wires brought down by trees. The railroad tweeted shortly after 1 p.m. that repairs had been completed.Globe Correspondent Jasper Craven contributed to this report. Melissa Hanson can be reached at email@example.com or on Twitter @Melissa__Hanson