Longest Tunnels Built Past 100 Years

This bar chart race shows the longest tunnels built over the past 100 years.

The numbers from start to finish of the projects are interpolated.
Tunnels under 5 km and under construction are excluded.
The first tunnel and the longest at the time, Col de Tende, was already finished and is shown as reference.

Music:
White Bat Audio - Distance
Karl Casey @ White Bat Audio https://whitebataudio.com