Motorists arrested for drunken driving after Labor Day festivities in Baltimore saloons won't have the excuse that they didn't have another way home. AAA Mid-Atlantic is teaming up with Yellow Cab and the State Highway Administration to offer free cab rides for alcohol-indulging drivers as part of its Tipsy? Taxi! program. Free rides will be available by calling 877-963-TAXI between 4 p.m. tomorrow and 4 a.m. Tuesday. Riders must be age 21 or older and have been drinking at a bar or restaurant in Baltimore. The first $50 of the fare will be free, with riders paying any amount above that. According to the AAA, the Labor Day holiday ranks among the most besotted occasions of the year as imbibers mark the passing of summer. Nationwide, there were 505 traffic fatalities over the 2006 Labor Day holiday - making it the fourth-deadliest holiday after the Fourth of July, Thanksgiving and Memorial Day. Last year, Tipsy? Taxi! provided 166 free rides on Labor Day. The program was launched over the Fourth of July weekend in 1996 and since then has provided more than 900 rides to impaired drivers, according to AAA.