Parsley, Linda L. The TRRL road investment model for developing countries (RTIM2), by... and R. Robinson - Crowthorne, Berkshire : Transport and Road Research Laboratory, 1982 - 27, 19 p - Transport and Road Research Laboratory. TRRL Laboratory report ; no. 1057 . Subjects--Topical Terms: Underdeveloped areas--Roads LC Class. No.: TE7 R63 no. 1057