[1] It is part of the transport network development project in the eastern seaboard.

It is an eight-lane intercity-motorway and originates in Si Rat Expressway Section D and Rama IX Road at the Sri Nagarindra Interchange in Suan Luang District, heading Eastern Thailand.

It goes through Si Racha District, connecting Laem Chabang at Nong Kham Interchange.

In this section, it is a six-lane intercity-motorway and intersects National Route 36 at Pattaya Interchange, and finally ends and joins Sukhumvit Road (National Route 3) in Map Ta Phut, Rayong.

This routes heading to coasts are planned as the semi-controlled access motorway.