California’s Transportation Future, Part Four – The Common Road

With light rail, high speed rail, and possibly passenger drones and hyperloop pods just around the corner, it’s easy to forget that the most versatile mode of transportation remains the common road. Able to accommodate anything with wheels, from bicycles and wheelchairs to articulated buses and 80 ton trucks, and ranging from dirt tracks to super highways, roads still deliver the vast majority of passenger miles.

As vehicles continue to evolve, roads will need to evolve apace. Roads of the future will need to be able to accommodate high speed autonomous vehicles. They will also need to be smart, interacting with individual vehicles to safely enable higher traffic densities at higher speeds. But can California build roads competitively? How expensive are road construction and maintenance costs in California compared with other states in the U.S.? How can California make the most efficient use of its public transportation funds?

PHYSICAL VARIABLES AFFECTING CONSTRUCTION COSTS

The Federal Highway Administration maintains a cost/benefit model called “HERS” (Highway Economic Requirements System) which they use to evaluate highway construction and highway improvement projects. One of the products of HERS is the FHWA’s most recent summary of road construction costs, updated in 2015. Its findings reveal both the complexity facing any cost analysis as well as the wide range of results for similar projects.

For example, on the FHWA website’s HERS summary page, Exhibit A-1 “Typical Costs per Lane Mile Assumed in HERS by Type of Improvement” data is presented in nine columns, each representing […] Read More