The indicator is a driving force indicator. The prices of transport services influence the growth of the transport sector and the choice of transport mode. It is important that prices be monitored to determine whether users are being given adequate incentives to use more environmentally friendly modes of transportation. However, there are variations over time that can affect the reliability of the comparison. For example, people no longertend to buythe same cars anduse the same package of transportation services (price/quality) as they did ten years ago ^[91].

According to the 2003 Indexed Consumer Price Index (CPI), by the end of 2020, the cost of passenger transportation by road increased by 374.2%, the cost of passenger transportation by rail increased by 290%, the cost of passenger transportation by sea and inland waterway increased by 397%, and the cost of passenger transportation by air increased by 201.4% ^[92].

GRAPH 120- REAL CHANGE IN TRANSPORT PRICES BY MODE

Source: TURKSTAT,2021

Notes: (1) 2003 = 100 Base Annual Consumer Price Index (CPI) index