A longtime Bow Valley resident says he wants see better warning signs posted along Highway 1 west of Calgary in light of a deadly crash there on Thursday.

A 69-year-old woman was killed and her 72-year-old husband remains in serious condition, but is expected to recover, after a deadly chain of events unfolded Thursday morning on the Trans-Canada Highway west of Calgary.

Two Alberta sheriffs were also injured in the collision east of Scott Lake Hill with the couple's silver SUV.

RCMP are blaming icy road conditions and say no charges will be laid.

After driving the Trans-Canada between Canmore and Calgary for the past 40 years, Richard Craig says he's learned where to ease up on the gas and grip the wheel a little tighter — and Scott Lake Hill is one of those areas

"The weather seems to change at that point in time, [and] the wind can come up and there can be blizzard and snow either way," he said.

He would like to see more warning signs posted to help drivers, especially tourists, navigate the busy highway.

"There are places where it says slippery when wet, or wind gusts, but I think there should be more warnings especially for people who don't travel this road," said Craig.

A spokesperson with Alberta transportation says between 2005 and 2010, 252 crashes were reported along a 17-kilometer stretch of highway that includes Thursday's crash site.

Of those, three people died and 73 others were injured.

Still, the province insists when comparing similar sections of highway, there were actually fewer crashes reported for the Scott Lake Hill section than the provincial average.