RTA may refer to:
Media Radio and Television Arts, program at Ryerson University, Toronto, Canada Radio Television Afghanistan RTA TV, an Afghan channel Radiodiffusion Télévision Algérienne Real-time attack, a game speedrun performed by a human without the use of external tools
Science and technology Rapid thermal anneal, in semiconductor fabrication Real-time analyzer of audio spectrum Renal tubular acidosis, a medical condition Restricted to Adults Retrospective Think Aloud RTA clade of araneomorph spiders Retrolateral tibial apophysis, defining the RTA clade
Transportation Railway Tie Association Road traffic accident
United States Regional Transportation Authority (Illinois), Chicago Regional Transportation Authority (Tennessee), Nashville Regional Transportation Agency of Central Maryland Regional Transit Authority of Southeast Michigan, Metro Detroit Central Puget Sound Regional Transit Authority New Orleans Regional Transit Authority South Florida Regional Transportation Authority
California Riverside Transit Agency, California San Luis Obispo Regional Transit Authority, California, US
Ohio Greater Cleveland Regional Transit Authority, Ohio RTA Rapid Transit, the rail system operated by the above body Greater Dayton Regional Transit Authority, Ohio
Australia Former Roads & Traffic Authority, New South Wales, Australia
United Arab Emirates Roads & Transport Authority (Dubai) Roads & Transport Authority (Sharjah)
Other uses Ṛta or rita, a Hindu religious concept RTA (Niger), a village Ready-to-assemble furniture Regional trade agreement Rehabilitation Through the Arts Residential Tenancies Authority, Queensland, Australia Rio Tinto Aluminium Royal Thai Army RTA 5 (Thailand); the Thai state-run television owned by Royal Thai Army Race Team Alliance RTA (album), by Rudra
See also Rita (disambiguation)