Thank you for signing this e-petition. There are no plans to reduce the urban 30mph speed limit to 20mph. The Government believes that local authorities are best placed to decide which speed limits are appropriate for their roads as they will invariably understand local needs and conditions. The Government provides local authorities with guidance to ensure those speed limits are appropriately and consistently set. The Government recognises the need for reduced vehicle speeds in areas where the more vulnerable road user may be present, such as roads around schools. However, research shows that simply reducing a speed limit from 30mph to 20mph will only reduce vehicle speeds by around 1mph unless proven traffic calming measures are also introduced. This is why the Department only recommend local authorities consider 20mph speed limits where vehicle speeds are already relatively low. A good example would be vehicle speeds of around 24mph. When a 20mph speed limit is introduced local authorities are required to place repeater signs along its length; traffic calming measures are not required but they can be used if the local authority considers it appropriate. Where lower speed limits are desired but vehicle speeds are in excess of 24mph, the Department strongly recommends local authorities consider introducing a 20mph zone. A typical 20mph zone will cover a number of roads, often incorporating school premises and must have proven traffic calming measures along its length to physically force drivers to reduce their speeds. The self-enforcing nature of a 20mph zone is such that additional enforcement is considered unnecessary. Research by the Transport Research Laboratory has found that accident frequency fell by around 60% and that the number of accidents involving children reduced by 67% in 20mph zones. The new research project titled "Local road safety evaluation and action learning" was commissioned in February 2008 and will take three years, with an interim report due in March 2009. The research is likely to include a survey of local authorities, which will cover 20mph zones and other local road safety issues.