"No traffic", laughs Henarco, pushing a parasol-shaded trolley along a railway track at great speed. He's been running these rails for 18 years, and at half the price of public transport and a fraction of the travel time, business is booming. "But we have enemies", Henarco says, referring to the high-speed trains, which come every 15 minutes, "when someone hears the hoot we just jump off!" The trains aren't the only enemies for the community of trolley drivers who live and work here. They also face periodic raids by the railway police. Yet the service the trolley guys provide buys them a lot of friends and a bit of tolerance...so long as they don't set up shanty towns where they work. "Dinner, lunch, everything on this trolley", says Henarco, who was relocated from a shanty town around these tracks, which was demolished by the rail authorities 2 years ago. Henarco and his two children now work, sleep and eat on his trolley and a small side-car, behind the walls of the University where Henarco once studied. "I studied computer technology, but I had no money to feed my family". For Henarco, the sacrifice was, "just common sense".