The foundation of city development as laid down by King Rama V was carried on by King Rama VI (King Vachiravudh) and King Rama VII (King Prachatipok) who followed up their father's (King Rama V) footsteps. In the occasion of 150 years anniversary of Bangkok, the Phrabhuddhayodfah Bridge was built to celebrate the city and brought much prosperity to the western Bangkok.

Althought all progress of Bangkok from the reign of King Rama IV to King Rama VII were based on the Western approach and model, the only positive benefits were carefully chosen. The roads that were built were lined with shade-giving trees on both sides of each route, with parallel canal for drainage.

The imported Western style residential buildings and shophouses or blocks that likely copied from Singapore were of superior standard for esthetic and utility. The front of each block connected to its adjacent blocks with a continuous arcade. Behind the block was added a small space for growing shady trees.

Road making and city planning in those days showed a high standard. in the inner city area was found a road system that intimately fused with the canal system. By the road area percentage, it is found that the road area in Bangkok were proportionate to the population, with its pleasant environment and shady areas aplenty, and marked by attractive buildings, monasteries, and ancient sites, all of which left a good impression on visitors.

Bangkok was extensively expanded and crowded by mass of population from all regions of the country to search their jobs and education. As a result of increasing of transportation, many canals were filled up and gradually turned into roads. The canals alongside the roads such as Silom Rd, Thonon Trong Rd(Rama IV Rd), Prajaechin Rd (Petchburi Rd), Ratchaprasong Rd, were also disappeared because of road expanding. The city walls and forts also were demolished to use the space for shophouses.

The remaining canals that survived eventually end up by invading of slums and buildings. Bridges over these canals were adjusted to road levels to allow easy driving. All these bridge lowerings were absolutely stucked the waterway transport.

Without any waste water management and the unbearable condition from an increasing number of inhabitants,these remaining canals unfortunately turned into drainage system which full of water pollution.

Whereas the waterways were dying, the roadways bacame the main transportation of the city. Bangkok was no longer a small town that once was on the Chao Phraya River when the majority of people closely bonded with the river and numerous canals.

Today Bangkok is a metropolitan city that have great masses of about 10 million people living over an area of 1,568 sq.km which is many times the original size. Land transport via roads, railways, and expressways makes it possible for the city to expand in all directions.

Bangkok today therefore is a great metropolitan city of the world that has evolved successfully and possesses elegant arts and culture and architecture that are worth every conservation and restoration effort so that they may stand and harmonize elegantly with changes occurring in the present world.