Véhicule Automatique Léger

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VAL 206 (right) and VAL 208 (left) as used on Lille Metro.
Interior of VAL 256 with manufacturer's decal.

Véhicule Automatique Léger (lit.'automatic light vehicle') or VAL is a type of driverless (automated),

medium-capacity rail transport system (people mover). The technology was developed at the Lille University of Science and Technology, was marketed by Matra, and first used in the early 1980s for the Lille Metro system, one of the world's first fully automated mass-transit rail networks, preceded only by the Port Island Line in Kobe, Japan.[1] The VAL technology is now marketed by Siemens
, which acquired Matra in the late 1990s.

A total of 11 lines in 8 systems based on the VAL technology are currently in operation worldwide. The current version of the VAL product is marketed as NeoVal (with a distinction between AirVal for airport environments and CityVal for more conventional transit environments).

The name is a

]

Technology

Original VAL

VAL-style track point as used on the Taipei Wenhu Line.

The VAL system uses a fully automated elevated

guideway, which may be metal or concrete depending on prevailing weather conditions. Primary suspension is by rubber tires, with pairs of horizontal tires to provide lateral guidance. Electrical power at 750 V DC is collected by shoes from the guidebars.[2]

The vehicles are lightweight 2-car sets (VAL 206 or VAL 208) with 124 total capacity, or twin sets (VAL 256) with 80 seated and 160 standing capacity. All axles on these vehicles are motored with 150 kW (201 hp) electrical motors. The system detects the location of trains on the guideway by the use of ultrasonic sensors.[3] VAL uses fixed-block signalling.

VAL can cope with unanticipated demand by inserting additional trains into the network as required by remote command from the control center. The control center computer system automatically speeds up or slows down trains in order to maintain a timetable. The VAL system can handle headways as small as 60 seconds, and the Lille VAL system rapidly proved itself with a 99.8% availability.[4]

In contrast to another early driverless metro system, the

Hayes, Middlesex and were used on the first line.[citation needed
]

In addition to the trains being driverless, the station platforms are unstaffed in normal operation. In the original

Lille metro system, they are monitored by a large closed-circuit television system with 330 cameras and 24 television monitors in a remote control room.[5]


NeoVal

CityVal for Rennes Metro Line B

In 2006 the NeoVal project, successor of the VAL, was announced. It features

overhead lines), making the cost of infrastructure much lower.[6][needs update
]

The NeoVal is offered in two versions:

VAL systems

Active systems

As of July 2021 there are a total of 12 lines in 8 systems operating with VAL technology:

VAL 208 cars on the CDGVAL at Paris CDG airport.
VAL 256 cars on Taipei Metro's Wenhu Line

Future systems

Defunct systems

Medium-Capacity Transport System

When VAL was introduced to

light metro" can be traced back to the Moscow Metro's Butovskaya Line
. Siemens now rather uses the terms "medium-capacity metro" or simply refers to VAL as a "people mover".

See also

Competing systems:

References

  1. ^ Bushell, Chris, ed. Jane's Urban Transport Systems 1995-96. Surrey, United Kingdom: Jane's Information Group; 1995. p178, 472
  2. ^ Bushell, Chris, ed. Jane's Urban Transport Systems 1995-96. Surrey, United Kingdom: Jane's Information Group; 1995. p472-3
  3. ^ Bushell, Chris, ed. Jane's Urban Transport Systems 1995-96. Surrey, United Kingdom: Jane's Information Group; 1995. p472-3
  4. ^ Bushell, Chris, ed. Jane's Urban Transport Systems 1995-96. Surrey, United Kingdom: Jane's Information Group; 1995. p472-3
  5. ^ Bushell, Chris, ed. Jane's Urban Transport Systems 1995-96. Surrey, United Kingdom: Jane's Information Group; 1995. p178
  6. ^ euromedtransport.org[permanent dead link]
  7. ^ "Siemens builds fully automated people mover at Suvarnabhumi airport". 17 July 2020. Retrieved 27 November 2020.
  8. ^ "Siemens delivers fully automated people mover for the Frankfurt airport". 3 April 2018. Retrieved 27 November 2020.

External links