Road travel in Colombia is adventurous. Much of the via nacional from Bogotá down to the coastal lowlands is a cheaply built two-lane road permanently clogged with 500-ton, seventeen-axle monster trucks laboriously puffing up or cautiously inching down steep inclines (cheaply built meaning no bridges, no tunnels, just bends, bends, bends). You travel at an average speed of 30 or 35km per hour. The monster trucks sometimes overtake each other. You learn to follow them when the one in front of you (or, if you‘re Colombian, five cars ahead of you) does. (So each overtaking lorry tends to take a whole gaggle of smaller cars behind it with it.) That way if it crashes into oncoming traffic you‘re shielded. Or so you hope.