A consultation on the future of transport in Leeds is under way in an effort to reduce escalating congestion.
Ideas include the development of new types of public transport such as an electric bus network and diesel-electric buses.
It is part of a Transport for Leeds study which is being carried out by the council and transport body Metro.
An exhibition vehicle will be outside the city's art gallery in Victoria Gardens until Saturday.
Research shows a 10% reduction in the number of peak time car trips would reduce the average journey time in the city by 20%.
Replace supertram
Transport for Leeds is looking into how investment in better transport systems could reduce congestion.
This could result in "significant" government funding for new transport such as electric trolleybuses, which would replace the city's failed supertram scheme.
The trolleybuses would follow a city centre loop, as well as a north route through Headingley, a south route through Hunslet and an east route via St James's Hospital.
Trolleybuses pick up their power supply from overhead wires and have lower emissions and make less noise than standard buses.
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