Motorists have been caught watching porn videos on their phone while driving, in a police blitz in Carlton on Thursday.

The discovery has led to calls for a restriction on accessing mobile phone data while driving.

Assistant Commissioner Doug Fryer has warned of the dangers of using a mobile phone while driving. Credit:John Woudstra

Assistant Commissioner Doug Fryer said that during a two-hour police operation, involving four Highway Patrol police officers, 53 people were issued with traffic infringements for using mobile phones while driving in Carlton.

"We had punters watching pornos, we had people watching movies, we had one guy that had a movie going and another phone so he could talk to his friends," he said.