Drivers are knocking down new traffic-safety pylons like they are bowling pins.

The city Department of Transportation had to replace some 2,500 of the posts last year at a cost of $261,000.

All but one in a row of six plastic bollards installed at Third Avenue and 14th Street in Manhattan in early December were gone a month later. And two of the replacements were toppled within weeks.

Dented and listing posts can be seen all over Manhattan.

The bollards are part of the city’s Vision Zero initiative to reduce traffic deaths.