[1] This tunnel bypasses the Kalwa and Mumbra railway stations, making it a fast line between Thane and Diva Junction.

After the Inauguration of the first railway line between Bori Bunder (now Chhatrapati Shivaji Maharaj Terminus) and Thane in 1853 and Extension to Kalyan in 1854 which was laid by the GIPR.

At that time the distance between Thane and Diva station was 9.6 km (6.0 mi) and the rail traffic was going higher, Due to that the quadrupling of Thane–Kalyan section was required.

And also becomes the landmark of a first-mile long tunnel constructed by Indian Railways, during the British period in India.

[3] This tunnel was electrified in the year 1925 with 1.5 kV DC by GIPR which came under the electrification project of Central Main line between Chhatrapati Shivaji Maharaj Terminus and Kalyan.