Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Road distances computed from googlemaps versus great circle distances computed from the X-IFU footprint calculator for a set of city pairs, with either Toulouse or Paris as the city of origin. The road distance is assumed to be a proxy of the train travel distance. Hence the train travel distance is computed from the great circle distance multiplied by 1.35
