Japan, South Korea and Australia.

Two systems, and conflating them is the single most common error written about Japan. What is deployed is not at 5.9 GHz and is not C-V2X.

Deployed. ITS Connect launched in 2015 for V2V and V2I safety, Toyota-led, fitted to Crown, Prius and Lexus models. Its radio interface is ARIB STD-T109, which ARIB titles “700 MHz Band Intelligent Transport Systems”; version 1.3 dates from 27 July 2017 and a free English translation is published alongside it. This is a different band and a different radio from anything at 5.9 GHz: it is not C-V2X, not PC5 and not within Ambimat's product scope. It is catalogued here as jurisdiction context, and nothing on this site implies support for it. ETC 2.0 at 5.8 GHz, DSRC-based, separately provides tolling and traffic information with a very large installed base.

Proposed. On 9 February 2023 the MIC established a Study Group on Next-Generation ITS Communications for cooperative automated driving, covering use cases, V2X/V2N coordination with mobile networks, and spectrum allocation policy for 5.9 GHz. The MIC Frequency Reorganization Action Plan, FY2024 version, published 13 December 2024, states that assignment of frequencies for V2X communications with a maximum bandwidth of 30 MHz (5895–5925 MHz) should be considered, with frequency assignment targeted for completion by FY2026 and migration schemes for incumbents to be studied. Those band edges come from the action plan; they describe a plan, not a completed designation, and a planned assignment is not described here as effective.

Engineering tests and technical demonstrations are running on the Shin-Tomei Expressway, with automated truck trials from 2024. Standardisation from 2026; practical implementation goal cited as 2030. The 700 MHz band continues in parallel. The ITS Connect deployment in detail →

The instrument is the Radiocommunications (Intelligent Transport Systems) Class Licence 2017, in its current compilation of 17 November 2021. A class licence needs no application and carries no fee: it authorises anyone to operate an ITS station provided four conditions hold.

• Operation on a frequency greater than 5855 MHz and not greater than 5925 MHz.
• Radiated power not exceeding a maximum EIRP of 23 dBm/MHz.
• Not within 70 kilometres of the Murchison Radioastronomy Observatory.
• Compliance with ETSI Standard EN 302 571, and with any applicable ACMA equipment rules. Where the two conflict, the frequency and power conditions above prevail over the ETSI standard.

Worth stating precisely, because it is often paraphrased too loosely: the instrument names no radio technology at all and references one European standard rather than European C-ITS standards generally. Which technologies are permitted therefore follows from EN 302 571's own scope, not from the licence. “ITS station” covers vehicle and roadside equipment alike, with no separate treatment. This remains a useful counterexample to India's proposed RSU authorisation model.

No binding national technology decision has been made. Commonwealth and state transport ministers have endorsed principles for a national framework only. On 26 March 2026 C-Roads publicly recognised Australia as having made C-ITS operational on C-Roads specifications, with Queensland as a C-Roads associated member. Austroads runs the Cooperative ITS Initiative. The C-Roads platform →

This page also previously grouped the United Arab Emirates and Brazil with Singapore as markets that should be treated as having no confirmed V2X spectrum decision, on the basis that no primary source had been located. That inference is not available from that premise, and the grouping has been withdrawn.

That position has since been resolved for all three, and by reading the publishers rather than by inference. Brazil regulates 5.9 GHz vehicular communication as restricted-radiation equipment: item 22 of Annex I to Anatel's Ato n. 14.448/2017 covers 5850–5925 MHz with seven 10 MHz channels, 23 dBm EIRP for V2V and V2I and 26 dBm for high-power V2I, and the top three channels limited to traffic and vehicular safety. The United Arab Emirates authorises 5855–5925 MHz for intelligent transport systems at 33 dBm e.i.r.p. under class authorisation, in version 5.0 of the TDRA ultra-wide band and short range device regulations. Taiwan's 5850–5925 MHz is an innovation experimental band administered by the Ministry of Digital Affairs, not the NCC, with the permitted test sites named in a gazette announcement of 27 February 2025 — which is why the former NCC frequency pages could not be found. Each is now a record in the catalogue with its verification note. All of the catalogue's open questions →