Friday is St. Patrick’s Day. It’s the start of the weekend, and some people might be celebrating a little too much with Irish whiskey,, Guinness or green beer.

And the holiday might lead to more people over-imbibing, because many don’t have to work on Saturday.

On the day before St. Pattick’s, the state Department of Transportation and State Police had some words of advice on highway message signs.

In capital letters, the message read. “DRIVE SOBER OR GET PULLED OVER,” followed by a more sobering one, “47 TRAFFIC DEATHS IN CT THIS YEAR.”

As they do every day, police will be looking for drunk drivers on St. Patrick’s Day. Trooper Kelly Grant said State Police will patrol highways and roads.

“If you see a suspected DUI operator, call 911 to report,” Grant said. “Last year, troopers arrested approximately 10 people for DUI.”

Local police will be watchful on their roads.

According to the website Wallet Hub, St. Patrick’s Day is the fourth biggest “drinking holiday” in the United States — following New Year’s Eve, Christmas and the Fourth of July. The site says that on the holiday a fatal, alcohol-related crash can be expected every 72 minutes.

Between 2011-15, a total of 252 people have were killed in car crashes during the St. Patrick’s Day holiday, according to the National Highway Traffic Safety Administration. In 75 percent of fatal car crashes on St. Patrick’s Day, the driver was two times over the legal limit.

During the post-party hours from midnight to 5:59 a.m., nearly a third of crash fatalites involve drunk drivers.

More Information

Parades

Friday:

Bridgeport, noon, starts at Harbor Yard on Broad Street

Saturday:

Milford, 1 p.m., Wasson Field parking lot on West Main Street

Sunday:

Danbury, 2 p.m., starts at Rogers Park

Greenwich, 2 p.m., starts at Town Hall

Of the Americans who drink alcohol on St. Patrick’s Day, 50 percent will choose beer, 19 percent will chose hard liquor and 9 percent will choose both, according to Survey Analytics.

A total of 52.1 percent of Americans plan to celebrate St. Patrick’s Day, and 29 percent will attend a party in a bar or restaurant, according to the National Retail Federation.

One of the biggest St. Patrick’s Day events in our region is the New York parade celebrating the holiday. On St. Patrick’s Day, Metro-North Railroad has banned booze on its cars, platforms and terminals. Riders caught with alcohol may have it confiscated by the Metropolitan Transportation Authority.

The goal, officials said in an annual notice, is “to maintain orderly travel for customers.”

Metro-North enacts similar alcohol bans on New Year’s Eve, and during SantaCon.