In other cities the cameras were eliminated after a gigantic upswing in the number of rear-end collisions.  People slamming on the brakes suddenly to avoid a ticket and just as suddenly the vehicle behind them is in their back seat.  This might appropriately be named "The Body Ship Benefit Act".  Or, perhaps, just institute a tax on rear-end collisions and reap a little more revenue to spend.  Oh, you want links?  Think DIY.  To maximize that income just shorten the "yellow" interval.