Section 5: Pavement Design
Anchor: #i1001740Overview
Pavement is designed based on the traffic loadings expected in the highway’s design lane, the lane expected to experience the greatest number of 18,000 pound equivalent single axle loads (18K ESALs) over the design period (usually 20 years). The traffic data required to calculate the ESALS include:
- base year ADT
- ADT traffic growth rate for the design year
- percentage trucks, including dual-rear-tire pickups and buses, for each classification category
- directional distribution for the design period
- lane distribution factor for the design period.
Traffic Data Provided
- ADT traffic growth rate for the design year
- percentage trucks, including dual-rear-tire pickups and buses, for each classification category
- directional distribution for the design period.