Kids headed back to school on September 4, which means school zones are now back in effect throughout Airdrie.

If RCMP catch you going over the posted 30 km/hr limit through a school zone or a playground zone, it's going to cost you as Cst. Megan Fillion from the Airdrie detachment explains.

School zones are in effect from 7:30 am to 5 pm on school days, while playground zones are in effect every day from 8:30 am until one hour after sunset.

Fillion says there's another law motorists need to be aware of.

For more information about school zones, you can visit the City of Airdrie's website or Alberta Transportation.