Police will be fining pedestrians caught darting dangerously in front trams in Melbourne's CBD after a spate of "near misses" this year.

Officers will patrol the major intersections around Flinders Street Station and Southern Cross Station in a three-day crackdown to stamp out unsafe behaviour around trams.

Offenders caught darting across tracks, or pedestrian crossings, in front of an oncoming tram face a $76 fine.

At least two trams are involved in collisions with pedestrians and cars each day in Melbourne.