Reference
Traffic volume count format, with a template
The layout a classified traffic volume count is recorded in — fifteen-minute rows, one column per vehicle class, both directions — as a CSV template for all 19 of our classes, with the IRC:64-1990 PCU factor for each.
Two files, generated from the schedule our software applies
- Columns
- 26
- Rows per day
- 192
What the format holds
Four things on every row
IRC:SP:19-2001 gives a typical proforma for the classified count, with fifteen-minute rows and a column per vehicle class. The template keeps that shape and adds what a reviewer asks for next.
Where and which way
Site, direction and date on every row. The template has 2 directions — Up and Down — each a full day of its own rows, so a directional split is a filter, not a recount.
Fifteen-minute intervals
96 rows per direction per day, from 00:00 to 24:00. An hourly total, and so the peak hour, is four rows added together.
One column per class
19 class columns — 18 named vehicle categories plus Other — each headed with its code and its PCU factor, so the sheet carries its own conversion.
Vehicles and PCU, side by side
A total in vehicles and a total in passenger car units on every row. A capacity assessment needs the second; a reviewer checking the count needs the first.
Filled in
The same format, from a real survey
Counts below are a real survey, not illustrative figures. 7 of the 19 class columns are shown; the delivered file carries all of them.
Classified volume count
combined.csv| Class | 07390745 | 07450800 | 08000814 | Total |
|---|---|---|---|---|
| Bus | 8 | 30 | 23 | 61 |
| Car/Van/Jeep | 162 | 369 | 393 | 924 |
| 2-Wheeler | 401 | 977 | 1,073 | 2,451 |
| 3-Wheeler | 128 | 353 | 319 | 800 |
| Mini LCV | 34 | 50 | 64 | 148 |
| 2-Axle Truck | 3 | 19 | 17 | 39 |
| Cycle | 20 | 50 | 47 | 117 |
| Total | 769 | 1,869 | 1,957 | 4,595 |
Recording began at 07:39, so the first window is partial (six minutes). The count file labels windows by their actual span; the verification index below aligns the same three windows to the quarter-hour.
Converting to PCU
Count times factor, then add
Multiply each class’s count by its passenger car unit factor and add the products. In this run, 2,451 two-wheelers at 0.5 come to 1,225.5 PCU, and 61 buses at 3.0 come to 183. Across every class, 4,595 vehicles come to 3,649.5 PCU.
The factors are IRC:64-1990’s, and every class with its PCU value is set out on its own page. What the count has to feed in a DPR is covered in the classified traffic volume count.
PCU summary per IRC:64-1990
pcu_summary.csv| Category | Count | Factor | PCU |
|---|---|---|---|
| Bus | 61 | 3.0 | 183 |
| Mini Bus | 6 | 1.5 | 9 |
| Car / Van / Jeep | 924 | 1.0 | 924 |
| 2-Wheeler | 2,451 | 0.5 | 1,225.5 |
| 3-Wheeler | 800 | 1.0 | 800 |
| Mini LCV | 148 | 1.0 | 148 |
| LCV | 1 | 1.5 | 1.5 |
| 2-Axle Truck | 39 | 3.0 | 117 |
| 3-Axle Truck | 10 | 3.0 | 30 |
| MAV | 16 | 4.5 | 72 |
| Tractor | 6 | 1.5 | 9 |
| Tractor Trailer | 16 | 4.5 | 72 |
| Cycle | 117 | 0.5 | 58.5 |
| Total | 4,595 | 3,649.5 |
Tractor recomputed at 1.5 (IRC:64-1990 Table 1, row 3). The file as delivered applied 4.5, the tractor-trailer factor: 27.0 PCU, 3,667.5 in total.
Next step
Or let the footage fill it in
- Classified count, per class and per direction
- Annotated verification video
- A note on what your camera position is costing you
No obligation. You keep the output. Back within a working day.