McLaren technical director Paddy Lowe says having two DRS zones in Canada may not increase overtaking.
The zones are expected to be situated on the final straight and the pit straight on the Circuit Gilles Villeneuve.
Speaking on a Vodafone McLaren Mercedes Phone-in, Lowe said: “It’s something the FIA have developed as a solution. This is the first race at which they’ve had the system fully commissioned in order to run two sectors.
“They clearly feel that will assist overtaking since that’s the point of the DRS.
“Whether it does or not remains to be seen. Our own analysis – which hasn’t been extensive, I must admit – seems to say that it may not particularly help.
“The role of DRS will play out mostly in the initial straight from the hairpin and the second straight may just aid with performance.
“In theory, if you’ve overtaken on the first straight, ironically the guy ahead will be able to continue to use his DRS on the second straight, even though he’s already overtaken, and open out a bigger gap.
“So we’ll have to see how that pans out”.
2011 Canadian Grand Prix
Image © McLaren