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Every car sold at the moment lowers the speed shown on the speedometer algorithmically. Therefore I can believe that although 20mph=32kph and I have problems re

Every car sold at the moment lowers the speed shown on the speedometer algorithmically. Therefore I can believe that although 20mph=32kph and I have problems reaching 32kph constantly on a gravel bike - when cars go 20mph they will go probably around 27kph which is the speed I can maintain on my bicycle. For something different - cars going at slow speeds emit more fumes and consume more fuel.

alexfoo 3y ago
> For something different - cars going at slow speeds emit more fumes and consume more fuel. There's research that refutes this for 30mph -> 20mph limit lowering. https://haveyoursay.tfl.gov.uk/lowering-speed-limits/widgets/31529/faqs#question9170 https://haveyoursay.tfl.gov.uk/lowering-speed-limits/widgets... " Do slower speeds cause congestion and pollution? Imperial College London's research into the impact of 20mph speed limits suggests they have no net negative impact on exhaust emissions. Results indicated clear benefits to driving style and associated particulate emissions. The research found that vehicles moved more smoothly, with fewer accelerations and decelerations, than in 30mph zones, reducing particulate emissions from tyre and brake wear. We have undertaken an Environmental Evaluation and are satisfied that the lowering of speeds will not have an adverse impact on the environment or air quality. The Environmental Evaluation recommendation was that no air quality modelling was therefore required. "
hardware2win 3y ago
>Every car sold at the moment lowers the speed shown on the speedometer algorithmically Your example increases speed shown 20mph shown and 32kmph being base means that 20mph shown and 27kmph being actual means shown is increased?
pjc50 3y ago
> Every car sold at the moment lowers the speed shown on the speedometer algorithmically. ? Do you mean "raises"? The legal requirement is that it MUST NOT under-report your speed. So generally they over-read by about 10% compared to GPS ground track speed measurement.

alexfoo 3y ago

> For something different - cars going at slow speeds emit more fumes and consume more fuel. There's research that refutes this for 30mph -> 20mph limit lowering. https://haveyoursay.tfl.gov.uk/lowering-speed-limits/widgets/31529/faqs#question9170 https://haveyoursay.tfl.gov.uk/lowering-speed-limits/widgets... " Do slower speeds cause congestion and pollution? Imperial College London's research into the impact of 20mph speed limits suggests they have no net negative impact on exhaust emissions. Results indicated clear benefits to driving style and associated particulate emissions. The research found that vehicles moved more smoothly, with fewer accelerations and decelerations, than in 30mph zones, reducing particulate emissions from tyre and brake wear. We have undertaken an Environmental Evaluation and are satisfied that the lowering of speeds will not have an adverse impact on the environment or air quality. The Environmental Evaluation recommendation was that no air quality modelling was therefore required. "

hardware2win 3y ago

>Every car sold at the moment lowers the speed shown on the speedometer algorithmically Your example increases speed shown 20mph shown and 32kmph being base means that 20mph shown and 27kmph being actual means shown is increased?

pjc50 3y ago

> Every car sold at the moment lowers the speed shown on the speedometer algorithmically. ? Do you mean "raises"? The legal requirement is that it MUST NOT under-report your speed. So generally they over-read by about 10% compared to GPS ground track speed measurement.