Utthayan Road formerly and still colloquially known as Aksa Road is a road in Bangkok, which is popularly regarded as the most beautiful road in Thailand. It is a broad avenue in western Bangkok's suburban Thawi Watthana District, and leads to the Buddhist park of Phutthamonthon in the adjacent Phutthamonthon District of Nakhon Pathom Province. It has been maintained by the Public Works Department, Bangkok Metropolitan Administration (BMA).
The road, 3.86 kilometres long in Nakhon Pathom Province and about 3,500 metres (11,500 ft) in Bangkok. It is extensively landscaped with 979 hamsa (mythological swan) lampposts, 18-metre (59 ft)-wide lotus-ponds in the central traffic island and three fountains. It serves as a link between Phuttamonthon Sai 3 and Phutthamonthon Sai 4 roads, and runs parallel between the nearby Phetkasem and Borommaratchachonnani roads.
The name was chosen to convey that the road served as an axis linking Phutthamonthon 3 and 4 roads. Its official name, which means "park", was later bestowed by King Bhumibol.
