Expert warns modern cars making 20mph limits easier to break

LONDON, UK. — As 20mph speed limits continue to expand across UK towns and cities, a mobility technology specialist has warned that modern vehicle design may be making low-speed limits easier to breach without drivers realising. The warning comes amid growing enforcement of 20mph zones, particularly around schools and residential areas, where even small overruns can result in fines or penalty points.

Recent research by Transport for the North, conducted between January and March 2025, found that 58% of people in northern England support the introduction of a national 20mph limit, rising to 74% among households with children and 82% among non-motorists. The study also found widespread concern about vehicles travelling too fast in local areas, especially near schools and pedestrian-heavy streets.

Migi Chuang, co-founder of Mobility Infotech and a specialist in mobility technology, says newer vehicles are engineered in ways that reduce the sensory cues drivers historically relied on to judge speed. With more than a decade of experience designing digital systems for ride-sharing platforms, vehicle fleets and everyday commuters, Chuang’s work focuses on how in-car software and interfaces influence real-world driving behaviour.

“Modern cars are exceptionally good at smoothing out noise, vibration and feedback,” Chuang says. “At 20mph, that creates a mismatch between what the car feels like and what the law measures. That gap is where many drivers unintentionally drift into enforcement territory.”

According to Chuang, features designed to improve comfort and efficiency at higher speeds can have unintended consequences in low-speed environments. Electric drivetrains and modern automatic transmissions deliver smooth acceleration with minimal noise, while enhanced sound insulation and quiet cabins remove auditory cues that once signalled speed changes. At the same time, large digital displays and infotainment screens can draw attention away from speed readouts, increasing the likelihood of small but significant speed increases going unnoticed.

Chuang also points to driver-assistance systems as a contributing factor. Cruise control and adaptive systems often default to higher stored speeds or accelerate smoothly to maintain distance from other vehicles, which can conflict with frequently changing urban limits if not actively monitored. Digital speed displays, she adds, can visually minimise the difference between 20mph and the low-20s, particularly in poor visibility or busy display layouts.

The result, Chuang says, is not reckless driving but a gradual erosion of feedback at precisely the speeds where legal margins are narrowest. “Most drivers are not deliberately speeding in 20mph zones,” she says. “The issue is that modern vehicles remove the cues people subconsciously use to stay within very tight limits.”

With local authorities increasingly relying on automated enforcement, Chuang believes the issue highlights a growing disconnect between vehicle design and urban traffic policy. She notes that as cars become quieter, smoother and more automated, drivers may need to rely more heavily on active monitoring rather than instinctive feel when driving in low-speed areas.

“When what the vehicle communicates to the driver doesn’t align with how speed is enforced, the consequences fall squarely on the driver,” she says.

Source: https://roadsafetygb.org.uk/news/survey-shows-public-support-for-20mph-speed-limits/

Contact Info:

Name: Migi Chuang

Email: PRTeam@nostringspublicrelations.com

Website: www.mobilityinfotech.com