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Modern city buses are made of various construction materials and the share of material
groups has changed over the decades. By replacing heavy materials for structural elements
or bus components with their lighter counterparts, the kerb weight of the bus can be reduced
by up to several hundred kilograms. This article presents the issues of the development
of city bus design in terms of passenger space comfort and bus structure in the context
of reducing the vehicle's own weight since the 1970s. The main changes in vehicle design
allowing for reducing the weight of structural elements of bodies and chassis as well as the
main assemblies in city buses are presented as well as research on body types in terms
of aerodynamics, safety and travel comfort. It has been shown that reducing the weight of
the bus does not negatively affect its load capacity and the new bus designs are equipped
with safety and comfort systems, including ABS (Anti-lock Braking System), ASR (Automatic
Stability Regulation), ESP (Electronic Stability Program) and air conditioning in the passenger
space. Thanks to modern light construction materials, we gain the opportunity to improve
safety and comfort without losing the transport capabilities developed as a result of the
development of city buses over the years.