From my count it is more than 20 lanes, maybe you considered the collectors to be on/off ramps (they are not). I based the 26 lanes on this comment.
“After widening was completed in 2008, a portion of the highway west of Houston is now also believed to be the widest in the world, at 26 lanes when including feeders. - (Wikipedia)
WTF”
Even if you include feeders on the largest highways going through Toronto, it is not close to 26 lanes.