By car:There are stop signs at most intersections, but in spanish "Alto" means two things, 1. stop, and 2. HIGH, so there's a joke that some people think "alto" street signs means pass at a high speed. Seriously though, you have to be very DEFENSIVE if you're just driving on the same road, and very OFFENSIVE if you're making a turn, if you're trying to get to the other side of the intersection, etc...
By bus: Most, if not all buses travel to terminal in David. Just stand on the side of the road and wave down a bus when you see it. They'll have written on the window where they go to and where they come from