I know that this is a Winnipeg-specific thread but I thought that this Manitoba traffic flow map might be of interest:
http://umtig.eng.umanitoba.ca/mhtis/flowmap2011.pdf
It shows the annual average daily traffic for provincial highways. I understand that an AADT of about 6,500 is where you start having the conversation about twinning a highway, and by that measure Manitoba actually isn’t doing too badly. There are only a few short stretches of untwinned road that approach or exceed that number.