The Kerava–Lahti railway line or Lahden oikorata (Lahti direct line) is a railway line in southern Finland between the towns of Kerava and Lahti, which opened on 3 September 2006.
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Kerava–Lahti railway line in the context of Mäntsälä
Mäntsälä (Finnish pronunciation: [ˈmæntsælæ]) is a municipality in the province of Southern Finland, and is part of the Uusimaa region. It has a population of 20,966(30 June 2025) and covers an area of 596.11 square kilometres (230.16 sq mi) ofwhich 15.26 km (5.89 sq mi)is water. The population density is36.1 inhabitants per square kilometre (93/sq mi). The municipality is unilingually Finnish. Mäntsälä is one of three municipalities in the Uusimaa region that do not have a Swedish name; the others are Nurmijärvi and Askola.
Mäntsälä lies about 60 kilometres (40 mi) north of Helsinki, the capital of Finland. During the last few years, the population of Mäntsälä has been one of the most rapidly increasing in Finland. A new railway, the Kerava–Lahti railway line, was built between Kerava and Lahti with passenger traffic starting on 4 September 2006 from Mäntsälä railway station. Helsinki is about 40 minutes away, and Lahti even closer. Highway 4 (E75) connecting both cities passes through Mäntsälä.
Kerava–Lahti railway line in the context of High-speed rail in Finland
Although Finland has no dedicated high-speed rail lines, sections of its rail network are capable of running speeds of up to 220 km/h (137 mph). The Finnish national railway company VR operates tilting Alstom Pendolino trains. The trains reach their maximum speed of 220 km/h (137 mph) in regular operation on a 75.7 km (47.0 mi) route between Kerava and Lahti. This portion of track was opened in 2006. The trains can run at 200 km/h (125 mph) on a longer route between Helsinki and Seinäjoki and peak at that speed between Helsinki and Turku. The main railway line between Helsinki and Oulu has been upgraded between Seinäjoki and Oulu to allow for trains to run at speeds between 160 km/h (100 mph) and 200 km/h (125 mph). Other parts of the Finnish railway network are limited to lower speed.
A new service called Allegro started between Helsinki and Saint Petersburg, Russia, in December 2010 with a journey time of 3½ hours. It utilized four trains, with a top speed of 220 km/h (137 mph) which were a Pendolino model, supporting both Finnish and Russian standards. However the service was discontinued in 2022, following the Russian invasion of Ukraine.