This research was commissioned in 2012 with the objective of calculating the optimum speeds for six categories of New Zealand state highways:
The findings of this report depend on the functional relationships between speed and road trauma, travel time, air pollution emissions and vehicle operating costs, the assumptions made, and the input parameters. The sensitivity of the findings to variations in these factors has been tested only to a limited extent.
For more detailed information refer to the full report below.
Keywords: safe, safety, speed, optimum, time, travel, value, air pollution, vehicle operating cost