An Open Access Journal
Table 2 Allowable values for road geometric features
From: Comprehensive model for upgrading two-lane road network
Network | V0 (km/h) | lane width (m) | Rmin, qmax, smax | |||||
|---|---|---|---|---|---|---|---|---|
Flat ground | Hilly ground | Mountainous ground | ||||||
qmax = 8% | qmax = 7% | qmax = 7% | ||||||
Rmin (m) | smax (%) | Rmin (m) | smax (%) | Rmin (m) | smax (%) | |||
Regional | 60 | 3.25 | 125 | 6 | 140 | 7 | 140 | 9 |
Regional/National | 80 | 3.50 | 250 | 4 | 280 | 5 | 280 | 7 |
National | 100 | 3.75 | 420 | 3 | 480 | 4 | 480 | 6 |