The Road Development Authority (commonly abbreviated as RDA); (Sinhala: මාර්ග සංවර්ධන අධිකාරිය; Tamil: வீதி அபிவிருத்தி அதிகார சபை) is the premier highway authority in Sri Lanka and is responsible for the maintenance and development of the National Highway Network, comprising the trunk (A class) and main roads and the planning, design and construction of new highways, bridges and expressways to augment the existing network in the country.

Road Development Authority

Agency overview
Formed	1971 (as Territorial Civil Engineering Organisation) 1983 (as Road Development Authority)
Jurisdiction	Government of Sri Lanka
Headquarters	"Sethsiripaya", Battaramulla, Sri Lanka
Annual budget	~US$ 2 Billion
Parent department	Ministry of Highways, Ports and Shipping
Child agency	Expressway Operation Maintenance and Management Division
Website	www.rda.gov.lk www.exway.rda.gov.lk

The RDA plans the future road network while conducting feasibility studies before major projects and post-evaluations after completion to ensure adequate economic returns.