They actually have a siteplan available here:
https://www.placesforpeople.co.uk/src/dist/img/siteplans/goldsmiths-green-jul25-siteplan.svg

and the key to the colours is halfway down the page here:
https://www.placesforpeople.co.uk/new-homes/find-a-new-home/goldsmiths-green/

Only a very small section is currently open to provide access to the marketing suite and the show house. About 6 houses opposite the show house were also accessible.

Sorry, Bridle Road.

Just for fun, here is a map from 1901 showing it marked as a Bridge Road :) https://maps.nls.uk/geo/explore/#zoom=15.2&lat=52.43165&lon=-0.74311&layers=6&b=ESRIWorld&o=100

This has been a public bridleway for at least 35 years since I lived in Rushton as a kid. The no "unauthorised" entry signs at the south end were put up a few years ago by the security company looking after the electric train track equipment but it is still a bridleway leading all the way to Manor Road in Rushton.
The council definitive map can be viewed here: https://www.northnorthants.gov.uk/rights-way-and-searches/definitive-map