Serious road safety concerns have been expressed by councillors and residents after plans for 128 houses in Lancaster were given the go ahead.
Barratt Homes is set to start transforming the Nightingale Hall Farm site in Quernmore Road after permission was granted by the planning committee.
But residents expressed concerns about increased traffic in East Road, Quernmore Road and Derwent Road, .
Barratt Homes says it will provide 30 affordable homes within the development and contribute £70,000 towards new cycling and walking routes, plus money for education provision and play areas.
Stuart Lawson, from Derwent Road, said he supported the development in general, but raised concerns about the volume of new homes at Standen Park, the Moor Hospital, Nightingale Hall, and a possible new development at Grab Lane.
Mr Lawson called for more safety measures on the roads and more regular bus services.
Coun Keith Budden said “the devil was in the detail” in how roads would be able to cope with increased traffic.
Coun Paul Woodruff added: “Why are they allowed to send us such a feeble, futile report on the highways?
“It’s the main focus, for goodness sake.”
A £500,000 transport contribution by Moor Hospital developers Storey Homes is yet to be spent by the county.
Coun Eileen Blamire said: “The sooner we get those traffic improvements, the better. Derwent Road is one of the most dangerous in the area.
“The people who are speaking here must be at the end of their tether but so many jobs have been lost at county level, so people need to understand that too.”
Councillors also called for an access point to the north west of the site to be kept open for cycling and walking.