"Until 1988 the Federal Highway Administration (FHWA) prohibited longitudinal installations on freeways.Utilities have been allowed to use highway right-of-way???but not freeway (expressways with fully controlled access) right-of-way???for power, communications, gas, water and other installations almost since the beginning of the federal and state highway programs.What FHWA AllowsA key section of t" . . . . .