ABC News' Picture This blog had a chance to ask Alejandro Cartagena about his collection "Carpoolers." The photo series peeks into the flatbeds of pickups from an overpass on Highway 85 in Monterrey, Mexico, providing cheeky glances at transportation in this newly suburban city but also serving as a commentary on the relation between people and their landscapes.

Cartagena notes that "carpooling" in flatbeds is illegal but remains common practice as the bus and metro systems have not caught up with the city's sprawl.