ENR, March 7, 1994 v232 n10 p5(1) Crumb rubber backers stand firm. (use of recycled tires in asphalt paving) Abstract: Concerned groups led by members of the American Institute of Architects and environmentalists are lobbying for the immediate implementation of the 1991 Intermodal Surface Transportation Efficiency Act (ISTEA). The bill mandates statewide use of recycled tires in asphalt paving by 1994. Supporters of 'crumb rubber' say that ISTEA will help reduce tire piles, which are health hazards and public nuisances. Article A15308739