HSL 3

HSL 3
HSL 3
Overview
Status	In operation
Owner	Infrabel
Locale	Belgium
Termini	Chênée(inLiège); Hergenrath (inKelmis);
Stations	0
Service
Type	High Speed Rail
System	Belgian HSL
Operator(s)	Thalys,ICE
Rolling stock	Thalys PBKA,ICE3M
History
Opened	14 June 2009
Technical
Line length	42 km (26 mi)
Number of tracks	2
Track gauge	1,435 mm(4 ft8+1⁄2in)standard gauge
Electrification	25 kV, 50 Hz AC
Operating speed	260 km/h (160 mph)
Route map
Route map
	Legend
	6.53 km
	4.06 mi
	This diagram: view; talk; edit;

TheHSL 3(Dutch:Hogesnelheidslijn 3,English:High-Speed Line 3,French:LGV 3, ligne à grande vitesse 3) is aBelgian high-speed railline. It connectsLiègeto theGermanborder nearAachen.The high-speed track length is 42 km (26 mi).

The line was technically completed in October 2007; however, it did not come into operation until 14 June 2009,^[1]whenICEtrains began service.Thalystrains have been using the line since 13 December 2009.^[1]The interval between completion of the line and its actual use was due to difficulties in the implementation of the safety systemETCS level 2,specifically, finding trains withERTMSfitted.^[1]

Together with theHSL 2between Louvain and Liège andHSL 1between Brussels and the French border, the combined eastward high-speed line has greatly reduced journey times betweenBrussels,ParisandGermany.HSL 3 has cutLiège–Colognejourney times from 1 h 23 min to 1 h 1 min.^[1]HSL 3 is used only by internationalhigh-speed trains(Thalys, now Eurostar; and ICE), as opposed to HSL 2, which is also used for fast internalInterCityservices.

Route

Trains leave the reconstructedLiège-Guillemins stationover the upgradedclassicline, at speeds which progressively rise to 120 km/h (75 mph). The dedicated high-speed tracks branch off from the "slow" line at the bridge over theOurthe,betweenAngleurandChênéestations in the suburbs ofLiège.The line crosses theVesdreriver, then traverses the 6.5 km (4.0 mi) longSoumagne TunnelbetweenVaux-sous-Chèvremont[fr]andSoumagne.This is the longest double-track tunnel in Belgium, and has a speed limit of 200 km/h (120 mph).^[1]

The line then runs parallel to theA3 motorwaywith a speed limit of 260 km (160 mi)^[1]shortly after the village ofWalhorn,it passes under the A3 in a cut-and-cover section, and rejoins the regular line. Trains run on the upgraded classicline 37at 140 km/h (85 mph), pass over theHammerbrücke viaduct(entirely reconstructed for the project), and cross the border 2 kilometres (1.2 mi) further on.

Beyond the border, high-speed trains travel along upgraded existing rail lines toAachen Hauptbahnhof.Trains useleft-hand runningalong this section (as in Belgium), switching over to right-hand running, which is common in Germany, at Aachen Hauptbahnhof.

Construction

Infrabel,the Belgian rail infrastructure manager, constructed the line through its subsidiaryTUC Rail,who built the 36 kilometres (22 mi) line between 2001 and 2007 at a cost of €830m, includingETCSLevel 2 signalling.^[1]

The most notable construction subproject is the 6.505-kilometre (4 mi 74 yd) long tunnel atSoumagne,which is the longest railway tunnel inBelgium.The bored section is 5.940 kilometres (3 mi 1,216 yd), extended by covered sections of respectively 177 metres (194 yd) and 388 metres (424 yd). Dozens of geological layers of differing hardness had to be tunnelled through, lime layers needing to be blasted through with dynamite. The tunnel reaches a depth of 127 metres (417 ft) in some areas; it has an average ramp height of 1.7%, with a maximum of 2% at the entrance in Soumagne. The free space profile in the tunnel is approximately 69 m²(740 sq ft), which restricts speeds to 200 km/h (120 mph). The tunnel was built between 14 May 2001 and August 2005.