City crews are out in force tending to roads and highways in and around the city as the snow continues to fall and it will be a slow go for drivers and pedestrians on Thursday.

A winter storm warning remains in effect for Calgary and most of southern Alberta and Environment Canada says total amounts between 25 and 35 centimetres can be expected in some areas.

The city says over 70 plows are currently clearing major routes and extra crews were also called in to tackle the accumulation.

“Right now the snow is falling and we do expect it to continue falling through the day. We’re currently focused, the Roads Department, on the priority one routes, that includes your Crowchild Trails, your Glenmore Trails, to keep the most Calgarians moving safely,” said Chris McGeachy, Roads Communications.

Additional crews are working to remove snow from sidewalks, CTrain and transit areas and parking lots.

Calgary police are advising motorists to take it slow and drive to conditions.

Officials say the best option is to stay home and off the roads if possible and the city has a few safety tips for those who do have to travel:

  • Plan ahead, leave early and give yourself plenty of time to get to your destination.
  • Bundle up and brush all the snow off your vehicle.
  • Be a good neighbour and help shovel if you can.
  • Watch out for roads crews and emergency vehicles and ensure you give them space to work.

There are also some transit delays and shuttles are assisting at some stations. People are being advised to check routes online before they head out or follow @calgarytransit on twitter for updates.

“We have a lot of city services that are in operation today. Calgary Transit is getting closer to running on time, they’ve had some challenges with the weather, and I’ve been informed that waste and recycling, they’re on schedule too,” added McGeachy.

The city says another snow route parking ban will be called on Saturday at 10:00 a.m. and will remain in effect for 72 hours.

"We are anticipating calling a snow route parking ban, which we expect will go into effect at 10:00 a.m. on Saturday morning,” said McGeachy. What it has to do with is our seven-day, council approved, snow clearing plan. So once the snow has stopped, that starts the counter and then we can begin finishing work on the priority one routes. We don’t actually get into the priority two routes until 24 hours after the snow has stopped. So it doesn’t really make a lot of sense for us to tell people that they can’t park until the snow has actually stopped falling.”

Vehicles parked on these routes must be moved so crews can clear the road from curb to curb.

There are also some delays and cancellations at the airport and travellers are also advised to check arrival and departure information on the Calgary Airport Authority website.

Driving conditions are also deteriorating on area highways and Highway 93 South from Radium to the B.C.- Alberta boundary has been closed in both directions.

The Trans-Canada Highway is closed from Lake Louise to Golden and according to 511 Alberta, there is no detour in place.

The TCH from Field, B.C. to the B.C.- Alberta boundary is also closed for avalanche control.

The QEII Highway is snow covered and visibility is poor. RCMP closed the southbound lanes near Didsbury for a few hours to deal with a multi-vehicle crash but that has since been cleared.

Police say extreme winter driving conditions exist on all roads and highways in southern Alberta and they are asking people to avoid highway travel if possible.

For the latest road conditions in Calgary, check the CTV Calgary Traffic Page HERE.

For updates on highway conditions, visit AMA Roads Reports and the DriveBC sites.

Download the CTV Calgary Sky Watch Weather App for real-time weather forecasts and video updates on conditions HERE.