Police Enforcement of 20 mph limit

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    The following information is taken from an interesting site – https://www.20splenty.org/ – a ‘not for profit’ organisation with over 600 local groups campaigning to make cities, towns and villages around the world better places to be.

    For a 20mph limit to be enforceable there are 4 requirements :-

    1. A relevant Traffic Regulation Order

    All speed limits, other than those on restricted roads, should be made by order under Section 84 of the Road Traffic Regulation Act 1984. Any speed limits below 30 mph, other than 20 mph limits or 20 mph zones, require individual consent from the Secretary of State. Unless an order has been made and the road is signed to the contrary, a 30 mph speed limit applies where there is a system of street lighting furnished by means of lamps placed not more than 200 yards apart.

    Note that there are no regulations regarding how to set a local speed limit. However, the Dept for Transport does provide guidance.

    Hence the Traffic Authority must make a Traffic Regulation Order to set the speed limit at 20mph. This includes publishing the order so that those affected may object if they wish.

    2. Appropriate signing

    In order that drivers are aware of the changed speed limit then the appropriate signage must be provided. These are regulations and must be adhered to. The regulations are slightly different for 20mph zones and limits but both must include the appropriate boundary signs where speed limits change and any point in the limit must be no further than 50m from a repeater sign, roundel or physical calming device. Note that since 2016 the frequency of repeater signs has been at the discretion of the Traffic Authority.

    3. Length of road, sighting, equipment

    In order for the police to enforce a limit then they require a clear distance for them to observe drivers and for drivers to see them. This may  make certain sites less suitable for speed detection. Different measurement equipment are available. Whilst in the past some “radar” based speed detectors were not approved for use below 30mph, most forces have “laser” type devices that are fully approved for use at 20mph.

    4. A Police Force that is willing to enforce

    This may seem obvious, and whilst police are becoming far more supportive of 20mph limits and their enforcement, it is clear that in some forces there is a reluctance to enforce. This may be as a result of individual police not understanding the law or a reluctance to commit resources. However as long as the above three conditions have been met then there is nothing to prevent action by the police.

    In 2019 the Association of Chief Police Officers has re-iterated the fact that 20mph speed limits are enforceable and where the limit is clearly marked (ie meeting signage regulations) then any offenders may be prosecuted. The police have also developed the option of speed awareness courses for those exceeding 24mph in a 20mph limit and these may be an option in some forces. Fixed Penalty Notices and prosecutions can also be used. In addition “light touch” enforcement can also be used which merely constitutes a reprimand/talk rather than anything more formal.

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