Sorry this is a bit long but here goes anyway :shock:
There are many roads around Heathrow that are mapped in Waze as public but are in fact private and should only be used if accessing the airport, not as short cuts or for traffic avoidance.
All roads inside and including the Perimeter roads are private (on the north side of the airport all roads south of the A4 should be included) and should not be used for general routing. If you don’t know Heathrow this may not sound controversial but we have these roads mapped as primary streets, one of them is a dual carriageway!

At each entrance to these roads is a sign with a red circle on a white background usually with Access Only posted below along with a copy of Heathrow Bylaws. However as we haven’t marked any of these roads as private Waze will happily use them for shortcuts or to avoid traffic.
Some examples:
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There are several UR’s on the A4 just north of the airport where Wazers travelling east have been directed just into the airport to join the M4 Heathrow spur and hence up to the M4.
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I was stuck in the usual M25 northbound queue last week when Waze suggested exiting at J14 following the M25 link into Terminal 5 then routing around the western and northern perimeter roads and onto the M4 spur. This then routed up dual carriageway and eventually onto the A40 / M40. Fantastic short cut bypassing all the M25 traffic but not legal!
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Traffic from the south east side of the airport can be directed by Waze to use the perimeter roads if heading north or west rather than using the A30 / A312 / A4.
Therefore I propose that all entrances to the airport should be properly set as private roads (where they pass an access only sign) but should the roads also be demoted from Primary street to just a street? I’m assuming the best way to do this is to just set a short one way only private road so that routing in is prevented but not routing out of the airport.
In addition there is an authorised vehicles only sign where Wright Way joins the Northern Perimeter Road. Presumably this is to stop traffic from T5 exiting the airport by any route other than the M25 link road.


Andy.