Network Reliability: Speed and Variance of Travel Time Survey
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| Sponsor | NZ Transport Agency |
| Speciality | Other |
| Provider | Beca |
| Contract Value | - |
| Administration Date | 2014 (Mar) |
| Frequency | Annual |
| Next Administration | 2015 |
| Primary Method | Observation |
| Primary Sample | Vehicles travelling at three travel time periods on five consecutive week-days |
| Response Rate | - |
| Sample Size | - |
| Secondary Sample | - |
| Response Rate | - |
| Sample Size | - |
| Sample Frame | Three travel time periods each day including AM and PM peaks, on five consecutive week-days, one month a year |
| Participation | - |
| Monetary Incentive | - |
| Geographical Region | Regional: Auckland, Tauranga, Hamilton, Wellington, and Christchurch |
| Average Survey length | - |
The Speed and Variance of Travel Time Survey monitors traffic congestion. The survey measures the reliability of travel time (Congestion index), minutes delay per km, compared to travel at the speed limit in the surveyed area. The NZ Transport Agency and Beca have undertaken effective measures to understand and accurately measure congestion levels in five key regions of New Zealand: Auckland, Tauranga, Hamilton, Wellington, and Christchurch. In conjunction with local and central government, Beca has developed key performance indicators to track trip reliability, by utilising GPS and GIS (Geographical Information Systems) to collect, analyse and store travel time information. Beca is also exploring new ways to address congestion, enabling authorities to gain a better understanding of where congestion most often occurs.
For a copy of the key indicators and 2014 results, please here.