Kyūshū Shinkansen (九州新幹線): This is the first stage of an HSR line between Fukuoka,
Kumamoto, Yatsushiro and Kagoshima. It extends between Yatsushiro (Shin-Yatsushiro Station) and Kagoshima (Kagoshima-Chūō Station), and was opened on March 13, 2004. Opening of the remaining segment, Fukuoka (Hakata Station) – Kumamoto – Shin-Yatsushiro, 103.5 km / 64.2 mi, is planned for March 2011. Trains will operate through between Ōsaka and Kagoshima.
Arlanda Express: Statistics include all passengers carried aboard Arlanda Express trains, which are permitted a maximum speed of 200 km/h (124 mph). The airport railway proper extends 17 km / 11 mi. The line was opened on 1999 November 24.
Frecciarossa - 2010 (estimate): Italy opened an HSR trunk line between Torino, Milano, Bolo- gna, Firenze, Roma, Napoli and Salerno, 898.9 km /557.3 mi, in stages during 1977-2009. The new Frecciarossa HSR services were introduced on December 13, 2009. At the time of writing, the renitalia website stated that these carried “a million passengers a month.” The authors used this as the basis for a passenger traffic density estimate for 2010, addressing uncertainty by rounding to a single significant digit.
X 2000: Statistics include all passengers carried aboard X 2000 trains, which are permitted a maximum speed of 204 km/h (127 mph). The system length statistic is exclusive of segments that have infrequent service by X 2000 trains (e.g. Gävle – Östersund, Sundsvall – Östersund).
Keystone Corridor - all: Statistics include all passengers carried on the Northeast Corridor line between Boston, New York and Washington, DC, whether aboard National Railroad Passenger Corporation (Amtrak) trains or not. Amtrak trains are permitted a maximum speed of 177 km/h (110 mph) on upgraded segments of this line.
LAV - Madrid-Valladolid: Statistics include all passengers carried on the dedicated HSR line be- tween Madrid, Segovia and Valladolid.
Keystone Corridor - Amtrak: Statistics include all passengers carried aboard National Railroad Passenger Corporation (Amtrak) trains between Philadelphia, Lancaster and Harrisburg.
Sources consulted by the authors did not provide passenger traffic statistics for dedicated HSR lines in Germany, nor for the component of “total” traffic on conventional lines in France, Germany and Sweden worked by “conventional” trains. For example, the lines worked by X 2000 trains in Sweden are also worked by “conventional” trains, but the authors did not locate passenger traffic data for such services.
The authors believe that annual passenger traffic density carried by the dedicated HSR segments in Germany is similar to that carried by dedicated HSR segments in France - 20 million - 30 million passenger-km per km of route.
Figure 1 (below) below illustrates the passenger traffic density statistics presented in Table 1 (above)