Alberta's tow truck drivers want to change the colour of flashing lights on their vehicles, because they say the current amber lights aren't prompting drivers to slow down and it's putting operators' lives at risk.

It was a sea of lights with a simple message that could save a life. “Please slow to sixty. Our families depend on it,” a blinking sign by the side of the road read.

A procession of tow truck drivers on Saturday was held in memory of a fellow driver who was killed on the job.