From today's featured list

London Bridge railway station
London Bridge railway station

The London station group is a group of 18 railway stations served by the National Rail network in central London. Most are terminal stations, either serving major national services or local commuter routes. A small number are through-stations that are considered terminals for ticketing purposes. All current stations in the group fall within London fare zone 1. Most London terminal stations were developed in the mid-19th century during the initial boom of rail transport. Many stations were built around the edge of central London, stopping at what is now the London Inner Ring Road, because it was prohibitively expensive to build right into the centre, and because each railway was owned by a private company competing with the others. The creation of the London Underground provided a practical connection to the various termini. Many of the stations have been upgraded and modernised to provide a greater capacity and connections to the network; the first London terminus, London Bridge (pictured) has been rebuilt and expanded on numerous occasions, and of the major 19th century terminals, only Broad Street has closed. (Full list...)

Today's featured picture

Semi-trailer truck

A diagram showing a side and underside view of an 18-wheeler semi-trailer truck with an enclosed cargo space. The underside view shows the arrangement of the wheels, and in blue, the axles, drive shaft, and differentials.

The numbered parts are:

  1. tractor unit
  2. semi-trailer (detachable)
  3. engine compartment
  4. cabin
  5. sleeper (not present in all trucks)
  6. air dam
  7. fuel tanks
  8. fifth-wheel coupling
  9. enclosed cargo space
  10. landing gear (legs for when semi-trailer is detached)
  11. tandem axles

Diagram: H Padleckas and Ju gatsu mikka

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