The longest railway tunnel in the history of Algeria is on course for completion. The construction of the Gantas railway tunnel is part of the project of doubling the track with rectification of the railway line between the stations of El Affroun and Khémis Miliana of the Algiers-Oran line. The total length of this two-tube tunnel is 14.68 km. The left side is 7.3 km long, and the right side is slightly longer 7.355 km. Currently, 13.70 km have been dug, representing a completion rate of 93.2%. The work is being done by China's CRCC / CCECC Group and is expected to be complete in July 2017.