Highway 7 - Kitchener to Guelph

[tomh009]

We know that highway expansion creates expensive sprawl (...)

It certainly has in the past.  But at least in Waterloo Region (don't know about Guelph) the region, the cities and the townships are controlling the suburban growth/sprawl, and directing additional demand to urban intensification.  In today's world, sprawl doesn't just "happen" as local/regional zoning has to permit it.