Richard, I now use the District Line more than I use the Piccadilly Line.My home station should be South Ealing but I now go to Either Ealing Broadway or Gunnersbury.I use the tube extensively 7 days a week and have done for nearly 25 years. And worked for the Underground for many years. As did my grandfather who was a senior engineer.I never go by the timetable unless using Gunnersbury.I've mainly given up on the Piccadilly line at busy times, the overcrowding is intolerable and one has to miss so many trains before being able to board that it is quicker to travel to a District line station! The congestion on the line to Acton Town can mean the 3 min journey from S E to A T can regularly take up to 18 mins.That's on top of trains regularly being held at Northfields to regulate the service. Even though the trains are full.The journey times are slower than 1972 because you have overlooked several key factors.The 1973 stock trains were delivered slightly larger than the 1959 stock which previously operated the line. Consequently, there are permanent speed restrictions on curves in the tunnels.Loading times have increased substantially since 1972 by a huge percentage.The trains carried guards enabling the trains to operate with safer shorter stop times with the cumulative time saving being 3-5 minutes.The Heathrow extension was not in use and the luggage, loading and pressure put on the line is way beyond planned expectations.You simply cannot compare the 1972 service to the current service, It has a completely different operating structure.There is no slack in the timetable at all and the signalling system is at breaking point. Not helped by a woefully inadequate computerised interlocking signalling operation for Acton which has caused problems since it was installed in the 1990s. The semi manual control system was far better.70 seconds is the exact additional stop time for a normal distance station. However, this is misleading. Braking and accelerating times have not been fully factored in as this is a fast section of track it has a chain effect and thus slows trains behind. The entire Piccadilly line timetable is structured around the fast non stop section of line and is signalled accodingly for the average highest speed. It allows for time catching as well as regulating. There is nowhere else on the entire line to do this.As Hammersmith is the next stop the delay may only equate to 70 seconds but the chain delay will back right up the line and for each stop will increase the journey time.It would be far more prudent for Turnham Green users, nay all western end District users to seek assurances from TfL and LU to upgrade the service on the District Line and have a far better service productivity record. This is an area that can be improved and 100% reliability at Turnham Green Junction is achievable far more so than the damage that will cause delays and overcrowding the length of the Piccadilly Line.NB 16,500 passengers per day is low for a surface Underground station with a branch junction. Nor did you mention just how many change for the Piccadilly line in either direction.
Oliver Gregan ● 4591d