In message ,
Colin Rosenstiel writes

Close the level crossings. Let the Highway authorities sort out alternative access.

Its not a simple question of resident access - at the moment the
crossings are the only alternative to the South Circular for emergency
services (hence some of the worst response times in London) and for
emergency diversions off the South Circular. The fire station, in
particular, is to the north of the railway and would therefore be cut
off from most of the borough. One of the crossings is also on a bus
route.

Possibly Rocks Lane (actually a pair of crossings) could be closed - but
ironically that is the only one with adjacent land that might make a
bridge possible. Bridges are the only (expensive) alternative to the
other two.

--
Paul Terry