9.4 - Benefits
9.4 - Benefits
Introduction
The evaluation procedure for TBhC projects include the following main benefit categories:
- benefits to people that change their travel behaviour
- benefits to remaining road users (congestion reduction and safety)
- health
- other monetised impacts including environmental effects.
Road capital, maintenance and operating cost savings
These are assumed to be negligible for the number of private vehicle trips and/or vehicle kilometres that are likely to be removed by TBhC projects.
Composite benefit values
Composite benefit values have been derived for a range of TBhC project types and situations. The composite benefit values include benefits to the person changing their travel behaviour as well as benefits to remaining road users and the general community, such as reduced health costs and accident risk, congestion reduction and environmental benefits. Composite benefit values are the average annual benefit for all people in the workforce, school or community targeted by the TBhC project (and take account of the proportion that do not participate or change their travel behaviour).
The composite benefits also incorporate the default diversion rate assumptions for each TBhC project type (see the previous section on Travel Impacts) as well as the average trip length for each mode affected by the project. If analysts consider they have strong reasons why a different diversion rate is more appropriate for their situation they can interpolate a composite benefit value (based on the values given below and their project situation compared with the default diversion rates) for workplace travel plans, or use a computer spreadsheet programme (available from Land Transport NZ) to forecast a diversion rate and calculate a composite benefit value for any TBhC project.
Workplace travel plans benefit per employee ($/annum)
| Workplace | CBD | Non-CBD | |||||
|---|---|---|---|---|---|---|---|
| Diversion | Low | Medium | High | Low | Medium | High | |
| Auckland | Standard | 0.00 | 160.88 | 0.00 | 137.88 | ||
| Alternative | 0.00 | 201.17 | 588.00 | 0.00 | 178.17 | 528.66 | |
| Wellington | Standard | 0.00 | 142.31 | 0.00 | 119.31 | ||
| Alternative | 0.00 | 178.21 | 525.78 | 0.00 | 155.21 | 466.44 | |
| Christchurch/ other | Standard | 0.00 | 40.84 | 0.00 | 40.84 | ||
| Alternative | 0.00 | 47.95 | 173.12 | 0.00 | 47.95 | 173.12 | |
Based on 100% of changed trips being in peak period
Standard = without passenger transport improvements or subsidies
Alternative = with passenger transport improvements or subsidies
School travel plans benefits per student on school roll ($/annum)
| School type | ||
|---|---|---|
| Primary | Secondary/intermediate | |
| Auckland | 25.87 | 106.98 |
| Wellington | 23.21 | 92.42 |
| Christchurch/ other | 15.34 | 43.21 |
Based on 55% of changed trips being in peak period
Household/ community based initiatives benefit per head of target population ($/annum)
| Level of diversion | ||
|---|---|---|
| Standard | Low | |
| Auckland | 85.06 | 25.46 |
| Wellington | 92.84 | 28.21 |
| Christchurch/other | 65.65 | 18.76 |
Based on 15% of changed trips being in peak period
