1/26/2024 0 Comments Underpass tunnel![]() Due to the difficulties in rescue and on-site evacuation for tunnel accidents, almost every accident causes large-area and long-term congestion, resulting in immeasurable economic losses and very serious social impact. Although urban underpass tunnels play a positive role in reducing urban road land, decreasing driving mileage, and dredging urban traffic, there are also many potential safety hazards. Therefore, many urban underpass tunnels have emerged. ![]() The development of underground space has become necessary to solve this contradiction. The conflict between rapid urban expansion and limited land resources is intensifying. It can reasonably improve tunnel design in China, ensure tunnel traffic safety, and seek the maximum comfort of the driver in the driving process. More importantly, this paper not only analyzed the effects of various structural parameters on drivers’ physiology and behavior but also proposed an optimized combination of structural parameters based on drivers’ physiological and behavioral comfort. The results show that the driver’s HR, RR interval, speed, and lane centerline offsets are significantly related to the tunnel height, slope, and slope length. On this basis, a structural constraint model based on the drivers’ physiological and behavioral comfort thresholds was also constructed. Then, a measurement model of the relationship among HR, RR interval, speed, lane centerline offset value, and structural parameters was established by using partial correlation analyses and the stepwise regression method. The heart rate (HR), interbeat (RR) interval, speed, and lane centerline offset value were collected for 30 drivers. Three parameters, including the slope, slope length, and height of a tunnel, were selected as research objects to explore the optimal combination of structural parameters in urban underpass tunnels. ![]() To investigate the physiological and behavioral comfort of drivers traversing urban underpass tunnels with various spatial structure conditions, a driving simulator experiment was conducted using 3DMAX and SCANeRTM studio software.
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