Engineering Solutions to Enhance Traffic Safety Performance on Two-Lane Highways

Table 2

Geometric features of G109, Beijing.

Design indexes	Units	Class 2	Class 3
Lane	—	2	2
Section	—	Origin to K28 + 560	K28 + 560 to destination
Design speed	km/h	60	30
Paving width	m	12.0	8.5
Shoulder width	m	0.5	0.5
Length	km	119.15
The minimum horizontal curve radius	m	10 (<60 m, 209 segments)
The maximum longitudinal gradient	%	9.49 (>5%, 87 segments)