On 16 Mar 2006 06:29:12 -0800, "TheOneKEA"
wrote:

Is there any sign of extension to the OHLE? It has always been said
that the stop at Mitre Bridge Junction to change voltage eats paths.
Extending the OHLE to the new station and allowing the voltage change
to occur during station duties a la Farringdon would be sensible IMO.

From the draft Cross-London RUS:

Assessment of Option 9

Description
Move the AC/DC changeover on the WLL to Shepherds Bush station

Issue
The AC/DC changeover on the West London line is currently located
between North Pole depot and Mitre Bridge Junction. This requires all
electric services to stop in section to effect the changeover, costing
around 2 minutes per train. The opportunity therefore exists to look
at moving the changeover point to the planned station at Shepherds
Bush.

Recommendation
The electrification engineer has advised that the cost of the
alteration would be prohibitive, due to the need for extensive
immunisation of the signalling equipment on the surrounding routes,
including the lines operated by London Underground. However, it is
understood that the Hammersmith & City line is due to be re-signalled
in 2013, and this may give the opportunity for the issue to be
revisited.


The full draft RUS is available at:
http://www.networkrail.co.uk/company...nsultation.htm