This Statistical Release presents the speed of traffic in free flowing conditions on roads in Great Britain during 2011. These statistics provide insight into the speeds at which drivers choose to travel and their compliance with speed limits, but should not be taken as estimates of actual average speed across the road network.
- Compared to 2001, the percentage of vehicles exceeding the 30 mph speed limit on built-up roads has fallen for every vehicle type. Between 2010 and 2011, the percentage of cars and motorcycles exceeding the 30 mph speed limit increased to 47 and 50% respectively.
- On motorways, 49% of cars exceeded the 70 mph speed limit in 2011, unchanged from 2010. 13% of cars in 2011 were recorded as travelling at 80 mph or faster, continuing the downward trend seen in recent years.
- Over 83% of articulated heavy goods vehicles exceeded the 50 mph speed limit on dual carriageway and 71% exceeded the 40 mph limit on single carriageway non-built-up roads.
- In 2011, motorcycles had the highest average free flow speeds across all road types except motorways. In addition 20% of motorcycles were travelling 10 mph or more above the speed limit on motorways and 21% on dual carriageways, the highest proportion of any vehicle for these road types.
Information on free flow vehicle speeds, including pre-release access list can be found here.