Transport for LondonHybrid buses
Diesel-electric hybrid buses
Hybrid buses reduce emissions of local pollutants and carbon dioxide by at least 30 per cent compared to conventional diesel buses.
Hybrid buses in use
There are 225 diesel-electric hybrid buses in London, running on routes 3, 12, 15, 16, 24, 76, 94, R70, 139, 141, 149, 380, 328, 360, 371, H91, E8, 73, 436 and 188.
The 225 hybrid buses operating in London are split between 7 bus operating companies and 10 different types of hybrid buses.
The New Bus for London also utilises hybrid technology and will have the latest in diesel-electric technology.
How they work
Hybrid buses are powered by a mix of an ordinary diesel engine and an electric motor.
The hybrid buses we use also have regenerative braking, which means they generate electrical energy when the brakes are pressed.
This electrical energy is stored in a battery pack and used to drive the electric motor.
Download our factsheet on hybrid technology (PDF 102KB)
The hybrid programme
Since the initial introduction of hybrid buses in 2006, manufacturers have developed variations of hybrid systems for trial in London.
The current programme, subject to the performance of trial buses, is to introduce 300 hybrid buses by 2012. We will work closely with bus operators and manufacturers to maximise the number of hybrids introduced after 2012.The pace of that roll-out will depend on funding being available and the rate at which vehicle production costs fall as volumes increase.
Environmental benefits
We test hybrid buses to make sure they produce fewer greenhouse gas emissions, harmful pollutants and lower noise levels.
Compared with diesel buses, hybrid buses deliver environmental benefits, including:
- Minimum 30 per cent reduction in fuel use
- Minimum 30 per cent reduction in carbon dioxide
- 3 decibel [dB(A)] reduction in perceived sound levels
- Reduced oxides of nitrogen and carbon monoxide
What do you think?
If you have travelled on a hybrid bus we'd like to hear about your experience.
Was it quieter? Did it feel different to a conventional diesel bus? Email your comments and feedback to customerservices@tfl-buses.co.uk.
