The historical data for diesel motor coaches, buses, and trolley buses in Spain from 2013 to 2023 show a fluctuating trend. Notable variations, such as a drop in 2014 (-0.21%) and 2015 (-0.3%), contrast the growth in 2016 (3.4%) and 2017 (2.39%). A slight annual increase was seen from 2018, averaging around 1.4%, despite a notable dip in 2020 due to external factors like the pandemic (-3.95%). As of 2023, the number stood at approximately 60.79 thousand units. The projected forecast suggests a gradual increase, with an average annual growth rate of 0.38% leading up to 2028.

Future trends to watch for:

Transition towards electric and hybrid vehicles due to environmental regulations.
Impact of urbanization policies on public transport demand.
Technological advancements in vehicle efficiency and automation.
Potential shifts in commuter behavior post-pandemic recovery.