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.

Harmoni is a TransJakarta bus rapid transit station located in Hayam Wuruk street, Jakarta, Indonesia. The name of the station comes from the name of the community for the local area taken from the Harmony Society Building which once stood in that area. It used to be a central station and transit point between corridor 1, 2, 3, 8, and other routes. Due to the construction of the Jakarta MRT, the operational of the station has moved into a temporary building located at the north of the original building. The temporary building has limited capacity that can only serves corridor 1 only and several routes have to be rerouted.