6、tnessmeasuringinstrument.andsummarizestherequirementsofthedetectionmethodfortheflatnessofeachgradehighway.Finally,puts forward the solutionforexistingproblemsandanalyzesthedirectionofthefuturedevelopment.Keywords:路面平整度;国际平整度指数;发展第一章简介1.1研究意义进入21世纪以来随着我国经济