MILPITAS (CBS SF) — A sinkhole closed two westbound lanes of Montague Expressway in Milpitas and might close a third lane if it continues to grow, Santa Clara County officials reported Friday evening.

The sinkhole was reported at 5 p.m. and the closure will last through the weekend into next week. County spokeswoman Marina Hinestrosa said a measurement isn’t available for the sinkhole but it is of a “considerable size” if three lanes may be closed.

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Drivers are being rerouted and westbound commuters can turn right on Great Mall Parkway to East Tasman Drive to connect to their destination.

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Hinestrosa said Waze and Google Maps may be the best applications to find alternate routes. The county has not released information regarding a cause for the sinkhole.

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