Impact of High-Altitude on Truck’s Climbing Speed: Case study in Qinghai-Tibet Plateau Area in China

Table 2

Specific information of test sections.

Altitude range; (m)	Entering speed; (km/h)	Starting station	End station	Grade; (%)	Grade length; (m)	Altitude; (m)	Horizontal; alignment
3000-3500	40	K217+080	K218+140	0.7	1060	3250	S
		K218+140	K218+960	1.2	820	3250	S
		K207+010	K207+680	1.7	670	3250	S
		K219+920	K220+740	2.2	820	3250	S
		K221+560	K222+220	2.7	660	3300	S
	75	K201+390	K202+370	3	980	3150	S
		K199+280	K199+970	4	690	3100	C (r= 1200m)
		K184+300	K185+000	5	700	3200	S
		K212+400	K213+100	5	700	3200	C (r= 900m)
3500-4000	40	K241+730	K242+670	0.5	940	3700	S
		K244+280	K245+290	1.2	1010	3700	S
		K249+910	K250+750	2.2	840	3700	S
		K267+470	K268+210	2.8	740	3700	S
	75	K262+740	K263+810	3	1070	3700	C (r= 1000m)
		K260+880	K261+580	5	700	3750	C (r= 1000m)
		K262+030	K262+740	5	710	3700	S
4000-4500	40	K391+090	K392+070	0.4	980	4250	C (r= 6700m)
		K362+080	K363+580	1.1	1500	4250	S
		K368+510	K369+390	1.6	880	4250	S
		K394+010	K394+800	2.4	790	4250	S
		K369+190	K369+900	2.7	710	4250	S
	75	K557+300	K558+180	3	880	4400	S
		K366+200	K367+090	4	890	4250	S
		K508+730	K509+360	5	630	4250	S
		K371+530	K372+230	5	700	4250	C (r= 1500m)
4500-5000	40	K573+900	K574+760	0.7	860	4700	S
		K586+675	K587+480	1.6	805	4700	C (r= 6000m)
		K577+790	K578+670	2.2	880	4750	C (r= 4000m)
		K581+755	K582+665	2.3	910	4700	S
	75	K597+635	K598+530	4	895	4700	S
		K572+560	K571+140	5	540	4600	S

Note: in the last column, ‘S’ means straight line, ‘C’ means flat curve, and ‘r’ stands for the radium of the flat curve.