Speed Behavior of Passenger Car on Helical Ramps and Helical Bridges in Mountain Riverside City

Table 1

Main technical parameters of the test objects.

Test object name	Location	(km/h)	Traffic lane number	Travel direction	Structural form	G (%)	Horizontal Radius (m)	Number of layers	Test vehicles	Participant identification number
Yangtze River Bridge (YZ)	Fuling District, Chongqing	20	1	one-way	Single column pier	4.5%	39.525 m for ascending ramp,; 50 m for descending ramp	2	Buick GL8 Firstland, Buick Buddha	D6–D15
Wujiang Bridge (WJ)	Fuling District, Chongqing	30	2	one-way	Single pier continuous cantilever beam	4.5%	51 m for ascending ramp,; 38.25 m for descending ramp	2	Buick GL8 Firstland, Buick Buddha	D6–D13
Rongqiao Helix Bridge (RQ)	Urban area of Chongqing	40	2	one-way	Door-type multi-span continuous beam	6%	Median strip radius 55 m	2	Benz Vito, Toyota Hiace, Buick Buddha	D1–D5; D10–D11; D13–D15
Jinkai Ring Bridge (JK)	Fuling District, Chongqing	20	2	two-way	Door-type multi-span continuous beam	5–6%	30 m (centerline)	2	Buick Buddha	D8–D15

: design speed; : gradient of the ramp.