The timetable was poor, Bremgarten West station was too far away from the town centre, and the connection to Zürich initially proceeded in the wrong direction and was very indirect.

[6] The new line crossed the Mutschellen pass between its two terminal points, was owned by the Bremgarten-Dietikon-Bahn company (BD), and built to metre gauge.

The BD entered into negotiations with the SBB, and in 1910, a permanent lease for the Wohlen-Bremgarten railway line was obtained.

In Bremgarten, a new stretch of metre gauge line was constructed to connect the two stations, including an imposing railway bridge across the river Reuss.

The route and timetable were integrated into the rapid-transit railway network, and three new stops with interchange facilities with other public transport modes were added.

[7][9] In June 2018, BDWM Transport merged with the Wynental and Suhrental Railway to form Aargau Verkehr AG (AVA), the company which now owns and operates the Bremgarten–Dietikon line.

After negotiating two sharp curves out of Bremgarten West station, the line runs along the 156-metre-long (512 ft) bridge over the Reuss.

The company's headquarters, including a depot and administration building, are located at Bremgarten station at an altitude of 389 m (1,276 ft).

A series of exceptionally tight U-shaped curves takes the line uphill, at slopes of up to 5.6%, to Berikon-Widen station on the Mutschellen pass at an altitude of 553 m (1,814 ft).

From here the line drops through equally tortuous curves to Rudolfstetten Hofacker, where the downward gradient becomes gradually flatter.

A section of 0.8 km (0.5 mi) length in Dietikon runs in the street, sharing its road space with other traffic.

Except on Sundays and public holidays, an extra two trains per hour are provided between Bremgarten West and Dietikon.

[3][4] The line uses the following rolling stock: There is a light rail system in the densely populated Limmattal area, west of Zürich, which connects to the Bremgarten–Dietikon in Dietikon.