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Originally Posted by
andyk
A modern forward looking city,Bordeaux preferred a tramway.Admittedly,Liverpool has many useful tunnels and disused track-beds that could be intergrated into a new network,but you cannot dismiss the fact that you get a lot more route for the same investment by choosing a tramway.
Andy, the priority in Liverpool must be reuse of existing underground infrastructure, for obvious reasons. How it can integrate into the existing Merseyrail network was always the problem. The Circle Line solves that, all is used apart from the Wapping Tunnel, which can be used to feed Kings Dock, the university and Chinatown later and branch into the Northern Line
In Liverpool trams ran on the central reservations of the Boulevards: Mather, Menlove etc. Using trams to service outer suburbs which don't have rail access along the boulevards is a sound notion. However the overhead wired trams don't mesh into Merseyrail - unless duel pickup of 3rd rail and overhead wires. The Bordeaux ground third rail trams may be the answer to Merseyrail tram integration.
The third rail....
"APS entirely replaces overhead. Each 8-m long section of powered third rail is controlled by a "coffret" (small metal box) installed in the nearby pavement, and this box contains the electronics that provide the security check analysis and control the system; from each of these boxes power is permitted only to those rail segments above which a tram is actually passing. The standard distance between these "coffrets", which are hardly visible, is 22 m.
The tram collects the electric power each time through skates, installed in the middle underneath the vehicle. This means that at the moment when one skate touches a neutral section, the other skate is drawing power from a powered section. In case of irregularities, the "coffret" is automatically switched off, and the tram continues its journey by switching to battery-generated power. Each "coffret" can also be switched in or out by the central control facility."
Back to the Liverpool Circle Line. The only section not built is from Dingle to Edge Hill. These APS trams can complete the circle using the Merseyrail third rail and out onto the streets using the APS ground 3rd rail pickup. Although the overground part may slow up the rapidness of the system. Also all Merseyrail rolling stock would need to go over to the APS tram rolling stock. It is better to complete such a loop underground. Then existing Merseyrail rolling stock can use the Circle Line and APS trams from rapid outer suburb routes can too.
Say an APS tram down Menlove Ave, it can then access this loop at the Mystery Park at Smithdown Rd (Sefton Pk station) and work its way into Edge Hill along the track there.
New fast APS services down boulevards that can access an underground outer city centre circle line are ideal. That mean all outer suburb line access all main point in the centre.
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Finally, I would just like to add that I really enjoy reading your contributions on this forum
Thanks, I like yours too.