Not like we would need an excuse to join a few hundred friends for a springtime plug-in vehicle drive through the Swiss Alps, but the World Advanced Vehicle Expedition (WAVE) is providing us with one. WAVE is putting on its annual shindig between May 31 and June 7, entrant Green Motorsport says, and the party's so big that WAVE's now giving out prizes for three categories: plug-in vehicles that are heavier than 900 kilograms (1,984 pounds), lighter than 900 kg and electric bikes.

WAVE says that last year, it set a world record for the size of its EV parade through its Zurich portion, tallying 305 gas-free cars rolling through town. There have been other attempts since then, but WAVE says no authority less than the Guinness Book of Records regards WAVE 2013 as the biggest parade of its kind. So there.

WAVE 2014 has the potential to be even bigger. The route will go through more than 20 cities and towns in Switzerland, Germany and Austria. For those who want to get, ahem, charged up about the drive, you can watch a 10-minute video of the 2013 WAVE rally below.

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