Improper skid resistance can lead to road accidents and driving discomfort. The study examined the effectiveness of 0.75-in. OGFC in ensuring skid resistance on New Mexico roads, categorizing them into interstate, US national, and state roads. Field friction/skid testing was conducted monthly on 1-mi sections of each road. Data were analyzed for skid resistance or skid number (SN) values. Overall, a poor correlation between the peak SN and SN value at 100% slip was observed. The peak SN values for I-10, I-25, and I-40 are found to be 77.44, 77.725, and 56.04, respectively. The peak SN values for US-60, US-70, and US-180 are 89.95, 31.32, and 87.93, respectively. The peak SN values for NM-04, NM-38, and NM-80 are 56.04, 16.17, and 84.77, respectively. No significant pattern in SN value can be observed among these three groups. In general, an SN value of more than 35 is considered adequate. The SN values at 100% slip are 82.95, 69.52, and 42.5 for I-10, I-25, and I-40; 39.92, 32.99, and 47.78 for US-60, US-70, and US-180; and 29.3, 56.9, and 59.42 for NM-04, NM-38, and NM-80, respectively. Average SN values of interstate roads are slightly higher than the US and NM roads; however, the difference is statistically insignificant. The study suggests that current road designs, surfaced with OGFCs, may not account for the different traffic speeds and volumes, indicating a need for tailored SN values for improved safety and comfort.
Evaluation of Skid Resistance of New Mexico Pavements
International Conference on Transportation and Development 2024 ; 2024 ; Atlanta, Georgia
2024-06-13
Conference paper
Electronic Resource
English
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