Canadian gas prices (west coast, outside Vancouver, anyway)
Our gas has fluctuated between 63.9 and 69.9 cents per litre lately - about $1.66 to $1.82 US$ per US gal. Almost all gas pumps have stickers on them showing a pie chart with supplier's costs, taxes and retailer profit shown. Taxes account for about 50% of the price, which means our pre-tax price is about the same as yours.
As far as I've seen, highways in the US are in better shape than in Canada (comparing SW BC with NW Washington), so apparently the taxes don't go to highways here, either.
By the way, there is absolutely no price fixing... it's strictly coincidence that all stations have exactly the same price, and changes happen at all stations within hours of each other every time.