**6. Highway capacity and level of service**

The capacity of the road is the maximum number of vehicles expected to pass over a particular part of a lane or road during a given period of time under the prevailing traffic conditions.

Service level is the qualitative measurement of the effect of a number of factors such as operating speed, travel time, traffic failures and freedom of maneuver, and crossing, driving safety, comfort, road suitability, and operating costs for the service provided by the road to its users. **Table 2** shows the characteristics of the service level according to the type of road [9, 10].


#### **Table 2.**

*Service level characteristics by road type [9, 10].*
