Unbelievable! It's almost as if subsidizing spam/noise transactions creates more of them. 
Indeed, building wider motorways doesn't necessarily solve traffic congestion. A bunch of other things sometimes do (raising gasoline/car taxes/prices, regulation, unemployment, crime, alternative transport, virtual working, better city layout, emigration...).
Problem: traffic congestion
Free market solution: build turnpikes for high-priority trips willing to pay the toll; encourage/decentralize ride-sharing for lower priority travel
Gavinista solution: put absurdly large wheels on the cars; ignore valid safety/engineering concerns contrary to GavinWheel fanboy preferences
