Bridges in Thailand: project timelines in Songkhla and on Koh Lanta

Bridges in Thailand across Songkhla Lake and to Koh Lanta should improve transport links in the south of the country, but the announced timelines still refer to construction plans. According to Nation Thailand and The Thaiger, notices to proceed with work are planned for November 14, 2026, and bridge openings are expected in 2029. These are different stages, and the November date does not mean travelers will be able to use the new crossings. For an upcoming trip, it helps to distinguish the routes themselves: the lake crossing will link districts in neighboring provinces, while the island project in Krabi will create a link with the mainland that should reduce Koh Lanta’s dependence on the car ferry, but for route planning it does not yet replace the ferry.

What is known

Construction contracts for both bridge projects have been signed on August 31, 2026. This was reported by the Public Relations Department of Thailand.

According to Nation Thailand, the Department of Rural Roads plans to issue notices to proceed with work on November 14, 2026. For the lake bridge, the outlet gives 2029 as the target opening year; The Thaiger also reports the expected opening of the Koh Lanta bridge in 2029.

In a government statement published after the contracts were signed, the agency was still preparing its notice to proceed with work. This describes the stage as of that statement: the contract signing itself confirms neither the actual start of construction nor the crossing’s readiness to open to traffic.

If you are considering trips to Krabi, keep this difference between stages in mind. A signed contract, a notice to proceed with work, and an open road route are sequential events that should not be treated as substitutes for one another.

Bridges in Thailand: which districts they will connect

The lake bridge will connect the Krasae Sin district of Songkhla Province with the Khao Chaison district of Phatthalung Province. These endpoints are specified in a statement from the Government of Thailand. The World Bank project document describes the crossing as a new two-lane bridge of about 7 km.

In Krabi, the new bridge will connect the mainland tambon Ko Klang with the tambon Koh Lanta Noi (Koh Lanta Noi) in the Koh Lanta district. Here it is easy to confuse the islands: the direct endpoint of the mainland connection is Koh Lanta Noi, not Koh Lanta Yai (Koh Lanta Yai).

The Thaiger gives the length of the bridge to Koh Lanta as 2.24 km and estimates construction will take about three years. These figures come from the outlet’s report, not a promise to open traffic on a specific day.

Project budgets and protection of Songkhla Lake

The budget for the bridge across Songkhla Lake, according to the Government of Thailand, is 4,604 million baht, and for the bridge to Koh Lanta it is 1,781 million baht. These are construction budgets, not the cost of crossing for drivers.

The lake project has a separate environmental context. The World Bank project assessment describes the Irrawaddy dolphins living here as an isolated subpopulation that is critically endangered. The lake’s importance for these animals is therefore a major part of the discussion about the crossing’s future, alongside its transport role.

What to do

When planning upcoming trips, do not treat the announced construction schedule as news that a road route has opened. For the road to Koh Lanta, factor in the car ferry: the new bridge should reduce the island’s dependence on it, but the project’s expected effect does not yet mean the new route is available.

When planning a road trip in Thailand, distinguish between reports about construction and reports about opening the route to traffic. Construction and opening timelines can change; before your trip, check transport authorities’ announcements on when traffic actually opens.