Public transport has much lower emissions than private transport modes such as cars. Individuals prefer to use private transport modes due to their ability to move faster in traffic. Public transport modes can overcome this disadvantage in urban traffic by given them preference in traffic. Signalised intersections are the best locations where you can give priority for public transportation e.g., trams, buses, etc.
A 'bus-jump' signals allows buses to take off before other modes and there remain ahead of the traffic.
These signals can help in promoting public transport and therefore result in reduced emissions.