Ideas for fast / slow line utilisation

[Bald Rick]

The junctions are effectively operated in parallel - eg up slow to Up Fast at Radlett in the same slot* as a down fast to down slow at Harpenden. * ie not at the same time, but using the same gap in the Up Fast.

I have, personally, looked at all the junctions. Radlett and Harpenden are the obvious ones to do something with but making them higher speed is very difficult, if not impossible. Both already have flashing yellows, and there is a proposal to put flashing yellows on Leagrave and Flitwick, although these are rarely used outside of a disrupted service (planned or otherwise).

 

[Aictos]

The complementary crossover of Harpenden South where down/up TL trains take up/leave the path on the fast lines is in effect a dual lead crossover made from two single lead crossovers. Down TL fast trains cross over on the single lead ladder at Carlton Road, and up TL trains leave the fasts via the West Hampstead South single lead, so the Belsize Tunnel separates the two. I's some time since I was on a train that didn't take one of thaose paths, but I suppose that is still available to allow a late down EMR train to loop the TL rather than delay everything.
St Albans only has one island platform and two single faced ones.

I should have said same track layout as Stevenage not including Platform 5 or Potters Bar for a idea of how the station will look.

Apologies I was thinking of a different station at the time.