The visitor trams seen in the original film were used by the Delos resort staff at the resort's hub to transport newly arrived guests (visitors) to one of their three theme parks of choice, after guests disembark from hovercraft.
The trams are small electric vans, with an open-top seating area at the back, capable of comfortably carrying several guests while fully occupied. Like the three parks they serve, the trams are accordingly color-coded: Yellow trams bring visitors to Roman World, red trams to Medieval World and blue trams to Westworld. After their arrival at the Delos hub, John Blane and Peter Martin are seen taking a blue tram to the latter, their destination.
Behind the scenes
The visitor trams were portrayed by small Taylor-Dunn Model B electric vans.