Routes
DTC vs cluster buses: what the colours mean
Updated · 6 min read · Figures from Delhi’s Open Transit Data, imported 18 July 2026
DTC is the state-owned operator; cluster (orange) buses are run by private operators under government control. For riders they are interchangeable: same fares, same passes, same route numbers. The feed splits the network 51% DTC to 49% cluster.
The two operators
- DTC (Delhi Transport Corporation) is the state-owned operator, running Delhi’s buses since 1971. Its classic fleet is colour-coded: red for AC buses, green for non-AC. DTC has also been adding a large electric fleet, including smaller 9-metre "DEVI" buses for neighbourhood feeder routes.
- Cluster buses (orange) are run by private concessionaires under the DIMTS (Delhi Integrated Multi-Modal Transit System) framework. Routes were grouped into "clusters" and bid out, with the government setting routes, fares and service standards.
How the network splits between them
Most riders assume orange buses are a small supplement to a mostly-DTC fleet. The open data says otherwise. Counting every route pattern in the current feed:
The cluster scheme, started in 2011 to replace the Blueline buses, now runs very nearly half of Delhi’s bus network. On a shared corridor the orange bus behind the green one is often running the same route, charging the same fare and honouring the same pass.
What is identical for riders
- Fares. The same distance-based fares apply on both fleets. See the fares guide.
- Passes. DTC passes are valid on cluster buses and the other way round.
- Women’s free travel. The Pink Saheli Smart Card works on both.
- Route numbers. A route keeps its number whichever fleet runs a particular trip.
- Live tracking. Both fleets broadcast GPS positions to Delhi’s Open Transit Data platform, so apps can show them on one map.
Where the difference shows
- Comfort. The colour tells you the temperature before the bus stops: red means AC (and a slightly higher fare).
- Crew and complaints. DTC buses have DTC crews; cluster buses are staffed by the private operator. Complaints go to different places, though both are overseen by the transport department.
- Frequency mix. On shared corridors, trips alternate between fleets. If a green bus is packed, the next orange one on the same route may be minutes behind; a live map will tell you.
A short history
The cluster scheme dates to 2011, created to replace Delhi’s privately run "Blueline" buses with regulated private operation: government-set routes and fares, privately supplied buses and drivers, monitored by GPS. That GPS requirement is why Delhi has one of the best open live-bus feeds anywhere, which is what makes live tracking possible.
Quick answers
Is my DTC pass valid on an orange cluster bus?
Yes. Passes are honoured across both fleets; that was a design requirement of the cluster scheme.
Are cluster buses private buses?
They are privately operated but publicly controlled. The government sets the routes, fares and service standards; the operator supplies buses and drivers and is paid per kilometre.
Do DTC and cluster buses look different on a live map?
Both report to the same feed. BusPe colours DTC buses green and cluster buses orange so you can tell them apart.
Fares and schemes are set by DTC and the Government of NCT of Delhi and can change. BusPe is independent and not affiliated with DTC, DIMTS or the Delhi Government. Spotted something wrong? Tell us.