The Solothurn–Worblaufen railway is a 29.71 kilometre-long, metre-gauge and electrified railway in the cantons of Bern and Solothurn in Switzerland. The Solothurn–Zollikofen section was opened in 1916 by the Elektrische Schmalspurbahn Solothurn–Bern (Solothurn–Bern Electric Narrow-gauge Railway, ESB), which was merged with the Bern–Zollikofen Railway to form the Solothurn-Zollikofen-Bern Bahn (Solothurn-Zollikofen-Bern Railway, SZB) in 1922. The Zollikofen–Worblaufen line was opened in 1924, allowing trains to run directly between Bern and Solothurn (until then passengers had to change in Zollikofen). The two companies were merged into the Regionalverkehr Bern-Solothurn (RBS) in 1984. Passenger traffic is now integrated into the Bern S-Bahn, while operation of the remaining freight traffic was transferred to SBB Cargo on December 2012.

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Solothurn–Worblaufen railway
Overview
Line number	308
Termini	Solothurn Bern
Service
Operator(s)	Regionalverkehr Bern-Solothurn
Technical
Line length	29.71 km (18.46 mi)
Number of tracks	1–2
Track gauge	1,000 mm (3 ft 3+3⁄8 in)
Electrification	1250 V DC overhead catenary
Maximum incline	3.0%
Route map Legend km elev SBB lines from Biel and Moutier asm to Niederbipp 0.00 Solothurn 432 m SBB line to Olten 1.97 Bleichenberg (until 2008) 460 m BLS line to Burgdorf 3.00 Biberist RBS 459 m 4.76 Ammannsegg (until 2008) 475 m 6.15 Lohn-Lüterkofen 465 m 7.41 Küttigkofen-Kräiligen (until 2008) 475 m 9.98 Bätterkinden 472 m 12.33 Schalunen 501 m 13.97 Büren zum Hof 506 m 15.05 Fraubrunnen 495 m 16.25 Grafenried 518 m Jegenstorf Spital (until May 1984) 20.03 Jegenstorf 521 m 22.21 Urtenen 530 m 23.17 Schönbühl RBS 525 m 23.56 Schönbühl Shoppyland 525 m 24.37 Moosseedorf 530 m SBB line from Olten SBB line from Biel/Bienne 25.61 Zollikofen Ost 548 m 26.95 Zollikofen 560 m SBB line to Bern old line to Bern 27.41 Oberzollikofen 560 m from Worb Dorf old line from Zollikofen 29.71 Worblaufen (Keilbahnhof) 520 m to Bern Source: Swiss railway atlas[1] This diagram: view talk edit

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The line is served by line S8 and RE5 (RegioExpress) services. Worblaufen is the centre of operations and also has a depot and the RBS workshop. All trains run from Worblaufen ro Bern on the Zollikofen–Bern railway .

The line is constantly being improved. Except for a short section, there are multiple tracks between Worblaufen and Jegenstorf and between Grafenried and Fraubrunnen.