Scottish Transport Statistics No 30: 2011 Edition

Table 4.1 Public road lengths (as at 1 April) by class, type and speed limit^1,2
	2000	2001	2002	2003	2004	2005³	2006	2007	2008	2009	2010
											kilometres
Trunk roads
Motorways
Excluding slip roads	378	378	378	383	383	383	391	391	391	391	391
Including slip roads	537	537	537	539	539	539	559	559	559	559	559
A roads
Dual carriageway	481	481	481	498	512	512	526	526	526	526	526
Single carriageway	2,470	2,470	2,470	2,395	2,381	2,381	2,320	2,320	2,320	2,320	2,320
Total	2,951	2,951	2,951	2,893	2,893	2,893	2,847	2,847	2,847	2,847	2,847
by speed limit:
up to 40 mph	248	248	248	264	264	264	218	218	218	218	218
over 40 mph	2,703	2,703	2,703	2,629	2,629	2,629	2,629	2,629	2,629	2,629	2,629
All trunk roads⁴	3,488	3,488	3,488	3,432	3,432	3,432	3,405	3,405	3,405	3,405	3,405
Local Authority major roads
Motorways
Excluding slip roads	-	-	-	-	-	-	-	-	-	-	-
Including slip roads	-	-	-	-	-	-	-	-	-	-	-
A roads
Dual carriageway⁵	225	225	233	228	228	245	242	242	243	243	229
Single carriageway⁵	7,188	7,182	7,184	7,190	7,190	7,188	7,182	7,139	7,178	7,178	7,185
Total	7,414	7,407	7,417	7,418	7,418	7,433	7,424	7,381	7,421	7,421	7,414
by speed limit:
up to 40 mph	1,416	1,429	1,437	1,440	1,440	1,453	1,485	1,491	1,515	1,508	1,509
over 40 mph	5,998	5,978	5,980	5,977	5,977	5,980	5,939	5,889	5,906	5,913	5,905
All LA major roads⁴	7,414	7,407	7,417	7,418	7,418	7,433	7,424	7,381	7,421	7,421	7,414
Local Authority minor roads
B roads
limit up to 40 mph	1,053	1,067	1,090	1,092	1,092	1,096	1,141	1,152	1,174	1,176	1,170
limit over 40 mph	6,324	6,325	6,329	6,346	6,346	6,361	6,318	6,349	6,292	6,318	6,311
Total	7,378	7,393	7,419	7,438	7,438	7,458	7,459	7,501	7,466	7,493	7,481
C roads
limit up to 40 mph	1,205	1,219	1,242	1,274	1,274	1,276	1,353	1,266	1,576	1,556	1,555
limit over 40 mph	9,094	9,104	9,079	9,052	9,052	9,059	9,065	9,104	9,091	9,102	9,098
Total	10,299	10,323	10,321	10,325	10,325	10,336	10,419	10,371	10,667	10,658	10,653
Unclassified roads
limit up to 40 mph	13,587	13,717	14,227	14,178	14,213	14,402	14,468	14,770	14,575	14,717	14,830
limit over 40 mph	11,721	11,727	11,720	11,717	11,717	11,716	11,683	11,661	11,712	11,726	11,732
Total	25,308	25,444	25,947	25,895	25,930	26,118	26,151	26,431	26,287	26,442	26,562
All LA minor roads	42,984	43,159	43,687	43,659	43,693	43,911	44,029	44,303	44,420	44,594	44,696
All roads (trunk and LA)
Motorways
Excluding slip roads	378	378	378	383	383	383	391	391	391	391	391
Including slip roads	537	537	537	539	539	539	559	559	559	559	559
A, B and C roads
Dual carriageway 5	706	706	714	726	740	757	768	768	770	770	755
Single carriageway 5	27,335	27,367	27,395	27,349	27,335	27,362	27,380	27,330	27,631	27,649	27,639
Total	28,042	28,073	28,109	28,074	28,074	28,119	28,148	28,099	28,401	28,419	28,395
by speed limit:
up to 40 mph	3,922	3,963	4,016	4,070	4,070	4,090	4,197	4,127	4,483	4,457	4,452
over 40 mph	24,119	24,110	24,093	24,004	24,004	24,030	23,951	23,972	23,918	23,962	23,943
Unclassified roads
limit up to 40 mph	13,587	13,717	14,227	14,178	14,213	14,402	14,468	14,770	14,575	14,717	14,830
limit over 40 mph	11,721	11,727	11,720	11,717	11,717	11,716	11,683	11,661	11,712	11,726	11,732
Total	25,308	25,444	25,947	25,895	25,930	26,118	26,151	26,431	26,287	26,442	26,562
All roads⁴	53,886	54,054	54,592	54,509	54,543	54,776	54,858	55,089	55,246	55,420	55,515

Source: Transport Scotland - Not National Statistics

1. Motorway road lengths are derived from GIS from 2000 onwards - see commentary for more details.
2. Road lengths are physical length rather than carriageway length e.g. 10km of dual carriageway counts as 10km, not 20km.
3. There is no change in the trunk road lengths for 2005 over 2004. This is due to new roads being opened after 1st April i.e. too late to be included.
4.Trunk road lengths for these roads have now been derived more accurately using a GIS system from 2006.
5. For 2008 and 2009 single and dual carriageways figures are estimated.
6. Provisional figure. A quality review has been carried out as part of the 2011 data collection. Figure will be confirmed as part of the 2012 data collection.