| Bridge Name: | Third Thai–Lao Friendship Bridge |
| Official Name: | Third Thai–Lao Friendship Bridge |
| Native Name: | Thai: สะพานมิตรภาพ ไทย-ลาว แห่งที่ ๓ Lao: ຂົວມິດຕະພາບ ລາວ-ໄທ ແຫ່ງທີສາມ |
| Locale: | At Samat, Nakhon Phanom Province, Thailand Thakhek, Khammouane Province, Laos |
| Carries: | Motor vehicles |
| Crosses: | Mekong River |
| Length: | 1423 m |
| Width: | 13 m |
| Open: | 11 November 2011 |
| Design: | Box girder bridge |
The Third Thai–Lao Friendship Bridge (Thai: สะพานมิตรภาพ ไทย-ลาว แห่งที่ 3, in Thai pronounced as /sā.pʰāːn mít.trā.pʰâːp tʰāj lāːw hɛ̀ŋ tʰîː sǎːm/; Lao: ຂົວມິດຕະພາບ ລາວ-ໄທ ແຫ່ງທີສາມ, in Lao pronounced as /kʰǔa̯ mīt.tā.pʰâːp láːw tʰáj hɛ̄ŋ tʰīː sǎːm/) 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.[1] [2] The bridge is 1,423 metres long and 13 metres wide.[3]
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.