Appendix: Sources and calculations
To see excel versions of the tabulations click here.
Rail
The source for passenger and tonne-km is the ORR’s National Rail Trends year book 2008
Equivalent bus plus lorry flows are obtained by:
| (a) | Dividing passenger-km by a bus occupancy of 20 (5 less than claimed as the occupancy of coaches leaving Victoria coach station) or 16 |
| (b) | Dividing tonne-km by 15 (half the capacity of a 44 tonne lorry) |
Adding the results of (a) and (b) and dividing by (i) the days in the year, 365 and (ii) the track length, 32,000 km yields the average flow per track.
Dividing passenger-km and tonne-km by the track length yields the density of use.
The following table provides the data for the years 2000 to 2007.
| Year | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 |
| Pass km (bn) | 38.2 | 39.1 | 39.7 | 40.9 | 41.8 | 43.2 | 46.2 | 49 |
| Tonne km (bn) | 19 | 20.6 | 19.7 | 20.1 | 21.6 | 23.1 | 23.2 | 22.9 |
| Equivalent daily bus plus lorry flows | ||||||||
| (a) 20 passengers per bus | 272 | 285 | 282 | 290 | 302 | 317 | 330 | 340 |
| (b) 16 passengers per bus | 313 | 327 | 325 | 334 | 347 | 363 | 380 | 393 |
| Density of use | ||||||||
| Mn Passenger-km per km | 1.19 | 1.22 | 1.24 | 1.28 | 1.31 | 1.35 | 1.44 | 1.53 |
| Mn Tonne-km per km | 0.59 | 0.64 | 0.62 | 0.63 | 0.68 | 0.72 | 0.73 | 0.72 |
| Totals | 1.79 | 1.87 | 1.86 | 1.91 | 1.98 | 2.07 | 2.17 | 2.25 |
Density of use
Densities of use are calculated by dividing the Passenger-km and Tonne-km by track or lane length.
As previously, the track length of the national rail network is 32,000 km. The lane length for the motorway and trunk road systems are estimated below where the route length for 2003 is from Table 7.8 of the TSGB and where the lane lengths assume (a) motorways average 6 lanes and Trunk roads 2 lanes and (b) motorways average 7 lanes and Trunk roads 3 lanes. In calculations the higher lane lengths have been used, namely 24,300 km for motorways and 52,000 km for motorways and trunk roads.
|
|
Route Length, Km |
Lane Lengths, km |
|
|
(a) |
(b) |
||
|
Motorways |
3,477 |
20862 |
24339 |
|
Trunk Roads |
9,340 |
18680 |
28020 |
|
Total |
12,817 |
39542 |
52359 |
Road
The source for the data is Transport Statistics Great Britain. In the table below:
- Carriageway lengths for 2006 are from Table the 7.9 of the TSGB 2008 or its equivalent for earlier years except that of 2000 to2001 there is no division between dual and single carriageways in the source. Consequently for those years the division has been estimated using the proportions for 2003. (Here we note that the section 7 of the TSGB 2008 has not been updated since November 2007)
-
Lane lengths are estimated from:
- Motorway length x 6 plus dual carriageway length x 4 + single carriageway length x 2
- Motorway length x 6.5 plus dual carriageway length x 4.5 + single carriageway length x 2.25
- The passenger-km on the motorway and trunk road network have been estimated by allocating the values for all roads available from table 1.1. of the TSGB in proportion to the non-good vehicle-km estimated from TSGB table 7.4.
- Likewise, the tonne-km on the motorway and trunk road network have been estimated by allocating the values for all roads available from table 4.1. of the TSGB in proportion to the good vehicle-km estimated from TSGB table 7.4.
- The density of use has been obtained by dividing the estimates of the passenger and tonne-km by the mean of the two estimates for lane length.
Table 2 Motorway and trunk road data
| Year | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 |
| Lengths motorway and trunk roads (km) | ||||||||
| Motorway | 3467 | 3477 | 3477 | 3477 | 3524 | 3520 | 3558 | 3559 |
| Dual Carriagways | 4558 | 4563 | 4563 | 3645 | 3575 | 3490 | 3490 | 3597 |
| Single Carriagways | 7121 | 7129 | 7129 | 5695 | 5572 | 5293 | 5233 | 5196 |
| Total Trunk | 11679 | 11692 | 11692 | 9340 | 9147 | 8783 | 8723 | 8793 |
| Lane Length (a) | 53276 | 53372 | 53372 | 46832 | 46588 | 45666 | 45774 | 46134 |
| Lane Length (b) | 59068 | 59174 | 59174 | 51817 | 51531 | 50494 | 50606 | 51011 |
| Vehicle, passenger and tonne-km | ||||||||
| All roads | ||||||||
| All Veh-km (bn) | 466.5 | 473.7 | 485.9 | 490.3 | 498.6 | 499.4 | 506.4 | 513 |
| Goods veh-km (bn) | 28.2 | 28.3 | 28.3 | 28.47 | 29.4 | 29 | 29.1 | 29.4 |
| Non-goods veh-km (bn) | 438.3 | 445.4 | 457.6 | 461.83 | 469.2 | 470.4 | 477.3 | 483.6 |
| Passenger-km (bn) | 669 | 678 | 690 | 731 | 736 | 733 | 746 | 749 |
| Tonne-km (bn) | 150.5 | 149.4 | 149.8 | 162 | 163 | 163 | 167 | 173 |
| Motorway and Trunk | ||||||||
| All Veh-km (bn) | NA | 173.1 | 174.7 | 158.8 | 162.3 | 160.50 | 164.00 | 164.6 |
| Goods veh-km (bn) | NA | 19.7 | 19 | 17.76 | 18.4 | 18.00 | 18.30 | 18.5 |
| Non-goods veh-km (bn) | NA | 153.40 | 155.70 | 141.04 | 143.90 | 142.50 | 145.70 | 146.10 |
| Est Passegner-km (bn) | NA | 233.51 | 234.77 | 223.24 | 225.73 | 222.05 | 227.72 | 226.28 |
| Est Tonne-km (bn) | NA | 104.00 | 100.57 | 101.06 | 102.01 | 101.17 | 105.02 | 108.86 |
| Density of use | ||||||||
| Mn Passenger-km per km | NA | 4.15 | 4.17 | 4.53 | 4.60 | 4.62 | 4.73 | 4.66 |
| Mn Tonne-km per km | NA | 1.85 | 1.79 | 2.05 | 2.08 | 2.10 | 2.18 | 2.24 |
| Total | NA | 6.00 | 5.96 | 6.57 | 6.68 | 6.72 | 6.90 | 6.90 |
| Percent on motorway and trunk | ||||||||
| % veh-km on M and T | NA | 36.5 | 36.0 | 32.4 | 32.6 | 32.1 | 32.4 | 32.1 |
| % Goods veh-km on M and T | NA | 69.6 | 67.1 | 62.4 | 62.6 | 62.1 | 62.9 | 62.9 |
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