European Transport Research Review

An Open Access Journal

Table 7 Criteria of road design quality

From: Comprehensive model for upgrading two-lane road network

Safety Criterion	Road Design Quality
Safety Criterion	Good	Acceptable	Not Acceptable
Ι			20 km/h < \|V₈₅-V₀\|
ΙΙ

where: V₈₅ = operational speed, V₀ = design speed and i = the number of curve

Back to article page