Promote an over-supply of housing (many story apartments) and small consumer service establishments (ground floors) near job clusters.<p>For mass transit to work best make it &#x2F;fast&#x2F; above all else make it fast.  If it takes longer to take the transit than it does to drive it&#x27;s not a viable option.<p>Another possibility for alleviating congestion is to provide parking silos at the edge of the city network and well connected local transit from them.<p>However the best thing that can be done to end gridlock?  Self driving cars save us please!