Transport and Road Research Laboratory text Crowthorne, Berkshire Transport and Road Research Laboratory 1974- continuing v. 26 p.: ill. ; 30 cm. Transport and Road Research Laboratory. "Department of the Environment." Latest issue consulted: 1050, published in 1982. Some issues of earlier title, TRRL report, have TRRL laboratory report on cover, 1973-1974. Technical report. 0 0 0 388_120000000000000_JON MCE 388.12 JON 0305-1293