Planning for the success of our towns and cities requires an ongoing and informed dialogue to develop between transport and land-use planning departments.
Mr Watts was speaking in London at the Joint Planning Officers' Societies' Conference on Urban Traffic Management.
Referring to the government's planning policy guidance (PPG13), published in 1994, he said: 'There is clear evidence of better integration, closer co-operation and greater understanding between the planning and transport disciplines.'
'We do not want to tackle congestion by encouraging businesses or residents to flee the centre.
'Hence the emphasis must be on making the most of our existing networks and promoting alternatives to the car - public transport, cycling and walking.
'And, of course, we must strive to develop complementary land use and transport strategies that will result in a reduced need to use the private car as new developments are sited in locations accessible by a variety of modes.'