Two DRS zones but one detection point in Canada | 2011 Canadian Grand Prix
The FIA confirms drivers can use DRS twice per lap during the Canadian Grand Prix.
Source: http://feedproxy.google.com/~r/f1fanatic/~3/uQlLOH7c-hY/
Mikko Kozarowitzky Willi Krakau Rudolf Krause Robert Kubica Kurt Kuhnke