Queues formed at the borders with Germany yesterday and further delays are expected.
Germany has increased border checks in an effort to control irregular migration. The controls could last for the next two months.
Germany has also increased checks with its borders with Poland and the Czech Republic.
The German foreign ministry says it aims to minimise disruption to commuter traffic.
Despite those efforts, cross border trams in Basel were also delayed due to the checks.
Heat to stay for now
Growing anger over World Cup red card
Fire damages trees in the Jardin Anglais
Cows sweltering in the heat
Lake Geneva nudists fight for their lake section
Holiday makers seek more than the sun
