I think if there was some incentive to gas stations to provide free compressed air again (along with decent built in tire pressure gauges) perhaps it could incentivize people to check their tires more often. At least up here in the US Northeast, many folks drive around in the winter on low tires. Between the cold temps and charging people for a couple minutes at the air compressor, few folks bother -- even though it would pay for itself in measurably improved gas mileage.