The Third Thai–Lao Friendship Bridge over the Mekong is a bridge that connects Nakhon Phanom Province in Thailand with Thakhek, Khammouane Province in Laos. The bridge's foundation stone was laid on 6 March 2009, and it opened for traffic on 11 November 2011. The bridge is 1,423 metres long and 13 metres wide. The name "Third Thai-Lao Friendship Bridge" was previously also used to refer to the planned bridge from Chiang Khong, Thailand to Houayxay, Laos, but this bridge is now known as the Fourth Thai-Lao Friendship Bridge. Traffic on the bridge drives on the left, as in Thailand, while traffic in Laos drives on the right; the lane-change is on the Laos side.