BOSTON (AP) — Four or more inches of snow has fallen across much of New England, delaying trains and making for a messy morning commute.

The MBTA says the commuter rail serving Boston and its suburbs is running up to 15 minutes behind schedule on many routes because of the snowfall.

Numerous crashes were reported on highways around the region, and the Massachusetts Department of Transportation lowered the speed limit on the westernmost portion of Interstate 90 to 40 miles per hour for several hours earlier Thursday.

Many schools were opening two hours late as plows worked to clear roadways.

The National Weather Service says another inch of snow could fall before the last of the storm blows out to sea.