Right now, it's the fact that EAP will not work faster than 5 mph above the posted limit. Here on Maui most roads are posted ten mph slower than even a conservative safe speed. So most traffic flows 15 mph over the posted limit. On roads with two lanes of traffic in each direction, at light traffic times, I'm fine driving 5 mph over the limit and cars can pass me easily if they want. On roads with just one lane in each direction, and when traffic is too heavy for easy passing, using EAP becomes a nuisance to other drivers because 5 mph over the posted limit is way too slow.