The city might tweak its rules regarding when snow events are declared. (CBC)

A council committee voted Wednesday to tweak Calgary's snow route parking ban system.  

Currently the ban can be declared any time there's more than five centimetres of snow.

When a snow event is declared, no parking is allowed on streets marked as snow routes.  

The committee has voted to drop the five-centimetre rule and leave it to the city's traffic engineer to determine when a parking ban is declared.

There will also be daytime or overnight parking bans, depending on the route.  

The proposed changes will go to city council for a vote next week.