GENEVA, SWITZERLAND – Allow more time to drive around Geneva on its ring road, where authorities have just put the speed limit down to 80 kph due to pollution levels.

Monday the lower speed was recommending but Tuesday it was officially restricted, as fine particles in the air reached 50 micrograms per cubic metre.

Geneva and neighbouring France are stricter about lowering the limit than are Vaud and Valais, which wait until the level reaches at least 75.

The canton provides a web page for the public on Geneva’s air pollution levels