The Bhumibol Bridge 1 and 2 were the king’s initiative in 1995 with an aim to serve goods transportation from the Bangkok Port to industrial areas in Samut Prakan and other regions in the country to ease land traffic in surrounding areas. King Bhumibol granted the name Bhumibol 1 to the northern bridge across the Chao Phraya River linking Bangkok and Samut Prakan, and the name Bhumibol 2 to the southern bridge that links Phra Pradaeng district and Samrong Tai sub-district. The two bridges are part of the Industrial Ring Road that connects Rama III Road to Poochao Samingphrai Road and Suksawat Road. The mega bridge crosses the river twice and has two cable-anchored spans of 702 metres and 582 metres. It is supported by two diamond-shaped pylons 173 metres and 164 metres high respectively.

In the middle there is an interchange taking traffic to and from Suksawat Road in Phra Pradaeng. The Klong [canal] Lad Pho Sluice Project was a project of His Majesty beginning in 1995 to develop Lad Pho Canal, a natural canal, as a shortcut to quickly sluice water out of the Chao Phraya River to the sea in large volume. Originally, Chao Phraya River flowed to the sea over an 18-km distance through the area of Bang Krajao, with the water’s journey taking about five hours. Klong Lad Pho sluice gate, since its operation in 2006, helped shorten the journey to only 10 minutes over a 600-metre distance.

The project can sluice water in the highest ratio of 500 cubic metres per second and is the main force to drain the water down the sea in a huge amount during the period during sea rise and when water rushes down from the north annually. The Klong Lad Pho sluice gate enables the water level to fall some 10-15 cm and helps the water flow to the sea from Nonthaburi, Bangkok and Pathum Thani, and has worked effectively since the Thai capital has survived major flood situations.