ABSTRACT
As for pavement maintenance management, cracking, rut and roughness are important issues. In recent years, with the spread of smartphones, the new response type of the measurement method has been developed, and it has been adopted as actual evaluation by local governments. In this paper, at first, response type roughness measurement technology and measurement repeatability will be discussed. In detail, by using developed IRI class 2 method named “BumpRecorder” longitudinal profile first, then IRI by quarter car simulation can be calculated. Calculated data about road roughness all over Japan has been recorded since 2011 until now, that is more than 1.8 million km long as of Sep. 2016. Especially road cracking is more significant issue than roughness. However, previously, it was difficult to detect by the conventional method of the response type. In this paper, the response type cracking detection method will be proposed. It only needs a smartphone, not requiring any other devices. The detection principle and results will be reported. In addition, as for roughness and cracking evaluation, section determination is important. Traditionally, a kilo post marker has been used for section determination. But it requires long time and much cost to make kilo post data. To solve such problems in this paper, “Square Mesh Section” will be proposed. It is determined by latitude and longitude. Using this section, only by collecting GPS data, it will be determined the same section under repeated measurement. Response type roughness measurement and cracking detection and Square Mesh Section will reduce data collection and analysis costs for pavement maintenance management.
