Mr Sherwood (NCE Letters 1 June) comments that your article on the Eden Project (NCE 18 May) mentions the 2,000 parking spaces but not public transport. While transport was a major consideration in site selection, other sustainability issues were also important.
One site considered was close to the Newquay branch railway line, but involved building the biomes on the exposed face of china clay waste tips at 200 metres AOD.
The energy required to maintain tropical temperatures in wind chill conditions was much higher than in the sheltered conditions in Bodelva pit at 60m AOD.
When placing such a project on a reclamation site in a rural area we had to ensure that sufficient parking would be available for the high peaks expected on summer bank holidays. We did not wish to create the 'Silverstone effect' of area wide gridlock.
The Eden Project will provide a bus service from St Austell bus/rail station, which will meet all principal trains. Combined travel and entrance tickets will provide a substantial discount.
Discounts will also be available for coach operators and the project is providing a substantial sum to the county council for improving footpath, cycle routes and bridleways to the site.
Hugh Collis (M), associate director, Arup Transport Planning, 13 Fitzroy Street, London W1P 6BQ