 The cars used for slabs are usually restored and/or customized full-size GM vehicles (Cadillac Fleetwood, Eldorado, Buick, or a restored Oldsmobile, e.g., Cutlass, Delta 88).The slab culture is associated with Houston hip-hop musicians.In recent years Houston's love affair with the car has cooled somewhat, with car usage falling by 15.2% since 1995 and heavy investment in public transport, including a light rail system opened in 2004, effectively signalling the return of the streetcar.