BANGOR — In the aftermath of the 75-vehicle crash on Interstate 95 in Carmel, the Maine Department of Transportation is collecting weather, road and traffic data from the accident to determine if its actions were sufficient to provide safe driving conditions.

There is no initial indication that any changes are needed, but a review of data that is routinely collected by the DOT will help officials make the determination, said Ted Talbot, a spokesman for the department.

“Maybe we did exactly what we should, but the conditions overtook any measures that we could have done,” he said, noting that snow was falling at a rate of 1 to 2 inches per hour.

Talbot said DOT trucks treated the span of highway where the crash occurred between Newport and Bangor approximately two hours before snow started falling Wednesday.

According to Director of Maintenance and Operations Dale Doughty, the DOT has a host of data sets available to determine if that treatment needs to be altered.

Plow trucks record air and road temperatures, as well as their speed of travel and the amount of salt or other products used to treat roads, he said.

Additionally, automatic weather stations record air temperature and precipitation, and some are equipped with devices that monitor the relative traction of the road, he said.

Plus, flashing speed limit signs — the ones that say 45 mph — used during hazardous driving conditions are able to monitor the speed of traffic, according to Doughty.

Those signs are also equipped with cameras to monitor road conditions, though they are not capable of recording vehicles’ license plates, he said.

The DOT is also pulling data from the National Weather Service to help determine conditions at the time of the accident and the effectiveness of road treatments.

Depending on temperatures, the DOT uses salt, a mixture of salt and water known as brine and a substance containing organic compounds and magnesium chloride known as “Ice B’Gone” to treat roads, according to Doughty.

The goal, he said, is to treat roads in advance of winter weather, preventing winter precipitation from bonding with roads and allowing for easier plowing.

The liquid solutions work better than salt, he said, because they interact immediately with snow and ice and do not tend to scatter on roads.

Sand is generally not used, he said, because it tends to build up, creating layers of sand and ice, and requires repeated applications to maintain traction.

“It’s really about bringing the level of service back quickly and provide for the most part a better level of service during the storm,” Doughty said.

Doughty said DOT officials could begin reviewing data as early as Friday and they could be finished with collections next week.

The review is not specific to the crash site and occurs routinely across the state to improve road treatments.