The widening of a secondary route . north/south would cut down on congestion. Give traffic an alternate path.
My main argument with this is that widening hwy 17 or 69 would have limited benefits. Hwy 17 isn't overly accessible if you live on the west side. 141 between 35/80 and Grimes is already a parking lot and wouldn't be able to handle the increase. The only people that would benefit from 69 being widened would Ankeny residents because again, this road has limited access.