The swarm had begun to shed altitude while tracking gradually northwest. They flew, at an altitude of maybe a hundred meters, up the incredibly wide freeway Saskia had seen from ground level yesterday. It was really a system of freeways at multiple levels, interlaced with ramps and crossed over, or under, by lesser freeways that would have been considered important in the Netherlands. It was bracketed between ground-level frontage roads, each many lanes wide and capable of carrying huge flows of traffic were they not partly underwater. "Interstates 10 and 45 combined is what you’re seeing," T.R. said. "I-10 connects L.A. to Florida; 45 runs up to Dallas and connects to points north. In the other direction it’s our connection to the Gulf." Presently those two roads parted ways and T.R. chose the left fork, veering onto a westerly course above 10, or the Katy Freeway as locals called it. "See, just looking at them on a map can’t do these constructs the justice that they are due," he remarked, then surprised them all by swooping down and taking the swarm for a roller-coaster ride beneath the many lanes of the 10, which marched across sodden ground on reinforced concrete pillars. "And people talk about Rome and what they built," T.R. muttered.