RTA

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

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
 * Rewriting Techniques and Applications, an annual computer-science conference

Transit

 * 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 and Transport Authority (Dubai)

Other uses

 * Ṛta or rita, a Hindu religious concept
 * RTA (Niger), a village
 * Ready-to-assemble furniture
 * Regional trade agreement
 * Residential Tenancies Authority, Queensland, Australia
 * Rio Tinto Aluminium
 * Royal Thai Army
 * Race Team Alliance
 * RTA (album), by Rudra