WHY is councillor Anna Semlyen apparently shy about her political identity when she calls for yet more roads to be made 20mph (Letters, December 10)?

She uses ridiculous environmental arguments in an attempt to inflict yet more 20mph zones in Gillygate, Nunnery Lane, etc.

The notion that driving a car at 20mph instead of 30mph will reduce pollution is rubbish as anybody who has a fuel computer will tell you.

Indeed, since the introduction of the Lendal Bridge fiasco, there is no way a car will ever get up to 20mph in these roads. Congestion creates pollution, not driving at a safe 30mph.

So please don’t attempt to get your fellow non-driving councillors to impose more 20mph zones.

David Fish, Mulberry Drive, Haxby, York.