The TransJakarta Corridor 1 is the TransJakarta bus rapid transit route in Jakarta, Indonesia. The route operates between Blok M Terminal and Jakarta Kota railway station. It is the first route of the TransJakarta BRT system. The roads that are traversed by Corridor 1 are along Jalan Sultan Hasanuddin, Trunojoyo, Sisingamangaraja, Sudirman, MH Thamrin, Medan Merdeka Barat, Gajah Mada / Hayam Wuruk, Pintu Besar Utara, Kali Besar Barat, Kunir, and Lada Dalam. Key integration points include Dukuh Atas TOD that is currently an integration point for four transport modes, Jakarta Kota Station which serves KRL Commuterline, and Harmoni BRT station that is one of the main hubs in the BRT system. From Blok M to Bundaran HI ASTRA stations, this corridor is in parallel with North–South Line of MRT Jakarta, thus many of the BRT stations are integrated directly with the MRT stations. Currently, all bus stations are served by buses 24 hours a day.

Transjakarta or Jakarta BRT is a bus rapid transit (BRT) system in Jakarta, Indonesia. The first BRT system in Southeast Asia, it commenced operations on 15 January 2004 to provide a fast public transport system to help reduce rush hour traffic. The system is considered as the first revolutionary public transit mode in the capital city of Indonesia. The buses run in dedicated lanes (busways), and ticket prices are subsidised by the regional government. Transjakarta has the world's longest BRT system, which operates about 4,300 buses. Transjakarta aims to have 50 percent of its fleet be electric buses by 2027. By 2030, the aim is for the entire Transjakarta ecosystem to use electric buses. As of November 2023, it serves an average of 1.134 million passengers daily.