A good round up of the issues about the possible solutions to reduce the overcrowding on this line. Once Thameslink works are complete in Central London the main bottleneck on the line will be the areas north and south of East Croydon, and the lack of platforms at East Croydon Station. See http://londonreconnections.blogspot.com/2011/03/east-croydon-problem-look-at-brighton.html for more details of this, plus a look at the some of the solutions, including the idea of a rail tunnel under Croydon.
Lack of capacity at East Croydon will be partly addressed if the East Croydon Masterplan comes to fruition and a 4th island is built at East Croydon, to the west of platforms 1&2, as part of the Ruskin Square development, see http://www.stanhopeplc.com/?page=42&id=613
The East Croydon Masterplan report will be approved at 21st March 2011 Cabinet Meeting is at http://www.croydon.gov.uk/contents/documents/meetings/546596/2011/2011-03-21x/cab20110321eastcroydonmasterplan.pdf
For all the good works proposed in the report, and in the case of the new passenger bridge, already agreed and funded, the masterplan fails to address the issue of local road congestion, with many minor roads subject to rat-running as cars, cabs, and lorries try to avoid the hold-ups around the NLA tower at the junction of Cherry Orchard Road, Addiscombe Road, and George Street, where trams, buses, cars, and cabs exiting the station, regularly bring the area to a halt. Will review the masterplan in more detail in a later blog.