Adhesion railway
（重定向自Factor of adhesion）
![Driving wheel of steam locomotive](/Images/godic/202501/12/Steam_locomotive_driving_wheel0633.jpg")
![Toppling limit on tight turn radius](/Images/godic/202501/12/TopplingLimit0633.png")
![Wheelset in the Central positionThe effect of lateral displacement](/Images/godic/202501/12/Wheelset.svg0633.png")
![Diagram of a railway wheelset showing the effects of lateral displacement](/Images/godic/202501/12/Wheelset20633.png")
Adhesion railway or adhesion traction is the most common type of railway, where power is applied by driving some or all of the wheels of the locomotive. Rail adhesion relies on the friction between a steel wheel and a steel rail. The term is particularly used when discussing conventional railways to distinguish from other forms of traction such as funicular or cog railway.