WordNet (r) 3.0 (2006):

road test
    n 1: a test to insure that a vehicle is roadworthy

Moby Thesaurus II by Grady Ward, 1.0:

42 Moby Thesaurus words for "road test":
   Gedankenexperiment, assay, audition, bench test, bring to test,
   confirm, cut and try, dry run, essay, experiment, flight test,
   give a try, give a tryout, have a go, hearing, pilot plan,
   play around with, practical test, practice, practice upon, prove,
   put to trial, rehearsal, research, run a sample, sample,
   shake down, shakedown, shakedown cruise, substantiate, taste, test,
   test flight, test run, trial run, try, try it on, try out, tryout,
   validate, verify, workout