| Summary: | 碩士 === 國立中央大學 === 土木工程學系 === 104 === Pavement skid resistance plays an important role in safety driving. Therefore, the routine inspection and monitoring for pavement skid resistance is very important. This study used the self-developed intelligent Blu-ray 2D Laser CCD pavement inspection vehicle to collect the pavement texture data of outer lane at National freeway No.3 Guanxi section (89k-83k), and analyzed the correlation with the Skid Number (SN) of Locked-Wheel Trailer. The results of linear regression showed that the relevance has its best result at 90kph, the correlation coefficient (γ)=0.9.The results of Genetic Programming (GP) mentioned that the validation R2 is 0.7 which has high explanatory power, it represents that the correlation between pavement skid number and pavement texture by using high speed measurement is highly related. The amount of error evaluation, the Mean Absolute Percentage Error (MAPE) of training period is 2.75%, and validation period decrease to 2.59%, it means that the accuracy is high when used to predict future values.This study also investigated the correlation between pavement skid number (SN) at National Freeway No.1 and the number of A2 class accident casualties in 2013. According to the cumulative percentage of accident casualties, data showed that at least 68% A2 accident incidence can be avoided when SN is greater than 48, and 95% A2 accident incidence can be dodged when SN is greater than 52.5, 99.7% A2 accident incidence can be precluded when SN is greater than 56.5. A threshold of freeway pavement skid number can be set up according to the A2 accident prevention rate, and establish the forecast model between pavement skid number of A2 accident prevention and pavement texture in Taiwan freeway.
|
|---|
