3Data records#
All data files shall be recorded as follows:
Table 3 – Travel time recording format
| Main UBD name | Main dir. of travel | Time period AM, PM, off | Date in brackets | Run No.1 | Example |
|---|---|---|---|---|---|
| Gateway | N | AM | (2013May30) | #58 | Gateway N AM (2013May30) #58 |
3.1Locations#
- Start location for the route
- End location for the route
- Intermediate waypoints along the route at key route choice locations
- centre of interchanges for motorways
- centre of intersections for unsignalised, roundabouts or traffic signals on other roads
- Advance start location where queues extend along the route prior to the works site.
3.2Times#
- AM travel time surveys – between 7:00 am and 8:30 am
- PM travel time surveys – between 3:00 pm and 5:30 pm
- Off-peak travel time surveys – all other times
3.3Other requirements#
Floating car method
- start times to vary randomly throughout the defined period
- runs to continue throughout the entire defined peak periods
The Administrator will define the locations for advance start, start, end and waypoints. The same points will be used at all stages of the project.
The data to be collected for each run shall be recorded as follows:
- Floating Car Method – per run
- Path Trace Method – data collected for each vehicle and aggregated in 15-minute periods
The data can be presented in a format similar to the following example. Alternative formats may be used so long as the data is consistently presented throughout the duration of the project.
Table 3.3 – Format for recording floating car or path trace method
| Location | Chainage (m) | Time (s) | Segment Travel time (s) | Segment Ave speed (km/h) | Segment Free flow Travel time (s) | Segment Free flow Ave speed (km/h) | Segment Delay (min) |
|---|---|---|---|---|---|---|---|
| Start | 0 | 0 | |||||
| WP1 | 1550 | 1:55 | 1:55 | 48.5 | 1:10 | 79.7 | 1:10 |
| WP2 | 3040 | 4:05 | 2:10 | 41.3 | 1:08 | 78.9 | 1:08 |
| Etc. | … | ||||||
| End | 4300 | 5:45 | 1:40 | 45.4 | 0:57 | 79.6 | 0.57 |
| Total | 4300 | 5:45 | 5:45 | 44.9 | 3:15 | 79.4 | 2:30 |