NEW YORK - Cabbies may think twice before refusing a ride.

Mayor Michael Bloomberg signed into law a measure that would impose heftier fines and tougher penalities on cabbies that refuse service or overcharge passengers.The new law raises the maximum fine for first, second and third offenses from $350 to $500, $500 to $1,000, and a license revocation, along with a maximum $1,000 fine, respectively.

The city's Taxi and Limousine Commission agency says servicerefusals are up more than 30 percent over the last year.

Mayor to crack down on cabbies who refuse outer-borough passengers