 If voters give the levy a thumbs up, it will cost the average homeowner about $250 more per year in property taxes. State Transportation Commission approved changes to the toll rates on the 520 bridge today, starting August 15th. Changes will increase the tolls by an average of 10% for the entire week. There will also be fewer rate variations, resulting in six different prices instead of eight, which price, of course, depends on which time of day you're driving.