In the realm of UK roadways, reduced speed limits have become an increasingly common sight, particularly on ‘smart’ motorways. While these lower speed limits may at times be a source of frustration for road users, it’s imperative to recognise that they are instituted for our collective benefit. Let’s delve into the reasons behind these speed limits and how they tie into UK law.
Why the Need for Lower Speed Limits?
Reduced speed limits find their place on our roads for a variety of reasons. They serve as a tool for efficient traffic management, especially during periods of heavy congestion, such as rush hours or in the aftermath of accidents. The National Highways Agency has taken a significant step forward by initiating trials of 60mph speed limits on specific roads. The primary objective behind these trials is twofold: to enhance air quality and to curtail the emissions of nitrogen dioxide (NO2), a notorious air pollutant.
The Geography of Change
These lower speed limits are being rolled out in areas where NO2 levels exceed the legally permissible limit. Currently, speed limit trials are underway on several key road stretches, including:
- M1: Junctions 34 to 33 (Rotherham)
- M6: Junctions 6 to 7 (Witton)
- M602: Junctions 1 to 3 (Eccles)
- M5: Junction 1-2 (Oldbury)
- M4: Harlington junctions 3 to 4 (Westbound)
- A1: Blaydon, Gateshead
The Duration of Trials
These trials will endure until NO2 emissions in the designated areas fall below the legal annual limit of 40 µg/m³. What’s noteworthy is that the trials remain in effect round the clock, even during periods of minimal traffic on the roads.
The Power of 60mph
You might wonder why a 60mph speed limit was chosen. According to initial findings from the Highways Agency’s research, lowering the speed limit from 70mph to 60mph has demonstrated the most significant impact on enhancing local air quality. On average, this reduction in speed contributes to a 17% decrease in emissions within these areas.
Impact on Journey Times
The Highways Agency assures us that these reduced speed limits will have a negligible impact on journey times, an encouraging prospect for all road users.
How will I know if I am on a road where the speed limit is reduced?
It’s essential for drivers to identify roads where the speed limit has been lowered. Any speed limit displayed within a red roundel above the carriageway is not to be taken lightly; it’s an enforceable, legal limit.
The penalty for exceeding the displayed speed limit aligns with that of breaking any other speed limit. The sentencing guidelines are meticulously outlined by UK law, ensuring that the consequences of non-compliance are crystal clear.
What if I have an electric car?
You will still need to comply with any reduced speed limit regardless of whether you have an electric vehicle which has no emissions, or you drive a petrol of diesel vehicle.
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