Study on Quantitative Expression of Cycling Workload

Improper design of the geometric elements and facilities bikeway systems could endanger cyclists’ safety comfort, resulting in an increased risk bicycle accidents; such accidents sometimes have severe consequences, namely casualties. The method expression for comfort question how correlation these factors with characteristics—such as geometry facilities—can be quantitatively described are key problems facing a reduction accident risk. Cycling workload can employed to assess comfort. However, there has been little quantitative research on this topic, no clear definition cycling workload. is important developing guidance safe operational management bikeways; necessary controlling conditions that might induce overworking discomfort among users. In paper, concept clearly defined based formation mechanisms. Through literature review comparative analysis, it inferred heart rate variability (HRV) used measure low-frequency–high-frequency ratio (LF/HF) physiological signal quantify A subjective scale was found effectively express feelings performance assessed according human factor engineering paradigm classified status into three qualitative levels—comfortable; stressful; stressful. order form various states obtain relationship between LF/HF data characteristics, we designed field experiment. This conducted by 24 participants who wore measuring apparatus under different characteristic scenario types including variations width, direction, edges at four speeds 10–25 km/h range. Statistical analysis address collected values results, model assessing established. By adopting classification regression tree (CART) algorithm data-mining method, threshold (ΔHRV) levels were obtained: 19 indicated level comfortable 79 stressful