Eco zealots are warning that the increasing dimensions of new cars - particularly 'oversized SUVs' - will wipe out one in ten roadside parking spaces in UK cities by 2040.They say growing vehicle size poses an 'unprecedented threat to urban space' that will 'eliminate vast numbers of parking spaces' over the next decade.New cars have been 'getting steadily bigger' for decades. They are becoming longer, wider and taller, with higher bonnets each year, according to analysis by green think tank Transport & Environment.This is despite family sizes and car occupancy declining, 'leaving vehicles taking up more room while carrying fewer people'.T&E claims that if the trend of 'carspreading' continues, city authorities will be forced to redesign their roads to accommodate bigger motors.This will cut on-street parking capacity by between 8.5 and 14 per cent by 2040, with London alone set to lose approximately 100,000 spaces, it forecasts. 'Oversized SUVs' and new cars generally getting bigger every year threatens to wipe out 10% of roadside parking bays in major cities by 2040, green campaigner say London could lose 100,000 on-street parking spaces within 15 years if new vehicle sizes continue to grow at the same trajectory, Transport & Environment warnsJoin the discussionShould cities put tighter limits on car size to protect space and safety, or is this just unfair to drivers?What's your view?The report shows this is being driven by a sustained increase in vehicle size since 2000.Newly sold cars in Britain are - on average - getting longer by 1.2cm each year.Vehicle height, width and bonnet height are all rising by around 0.5cm annually.T&E has accused carmakers of 'shifting away' from smaller models in favour of larger, more profitable vehicles, accelerating the squeeze on urban space.'After 25 years of relentless growth, our streets are dominated by oversized SUVs that cities simply weren't designed for,' explained Anna Krajinska, T&E UK director.'The result is a lose-lose: councils are forced to reshape streets around larger vehicles, sacrificing parking capacity, public space and safety in the process.'This is a market failure. Without clear standards to limit car size and encourage right-sizing, carspreading will continue unchecked, and cities will keep paying the price.' T&E showcased the rising dimensions of cars between 2000 and 2025 - and based on that trajectory, how big new models could be by 2040 While the original Range Rover was quite a large vehicle for its day, it now pales in comparison to modern era models, like the previous-generation Range Rover Autobiography pictured