Long-distance road journeys were made by private Mercedes-Benz coach buses or vans, trucks and cars. Although a nationwide bus service was available from Kabul, flying was safer, especially for foreigners. The city's public bus service (Millie Bus / "National Bus") was established in the 1960s to take commuters on daily routes to many destinations. The service had about 800 buses. The Kabul bus system had discovered a new source of revenue in whole-bus advertising from MTN similar to "bus wrap" advertising on public transit in more developed nations. There was also an express bus that runs from downtown to Hamid Karzai International Airport for Safi Airways passengers.