The Visual Display

A design with similar strengdrs is Mareyt graphical train schedule
for Paris to Lyon in rhe r88os. Arrivah aad deparnles from a
sbtion are locared along the horizontal; length ofstop at a station
is indicated by the length of the horizontal line. The stations are
separated in proportion to their actual distance apart. The slope
of$e line reffeca the speed ofthe trein: the moie nearly vertical
the line, the faster the nain. The intersection of two lines locates
the_time and place that trains going in opposite directions pass
In 1981 a new €xpress nain from Paris to Lyon cut rhe rrip ro
under chree hours. compared to more than njne hours when Marel
pubJrshed tfie graphical train scheduJe. The path ofthe modem
'tc\ (taifl d yafl.le uitesse) is sho*,n, overlaid on the schedule of
1oo years b€fore:
GRA?rlIC]lT EXCET,LENCI 31
E. J. MNy, Ir n.thod. yathique P'n'
r88r, p.20. Th. ne!}od is nkibured
to the French eDgineer, !bry.