Just put {{Lyon Transport icon|#}}
where # is the line wanted. In other words:
{{Lyon Transport icon|T1}}
T1
{{Lyon Transport icon|T2}}
T2
{{Lyon Transport icon|T3}}
T3
{{Lyon Transport icon|T4}}
T4
{{Lyon Transport icon|T4}}
T5
{{Lyon Transport icon|C1}}
C1
{{Lyon Transport icon|C2}}
C2
{{Lyon Transport icon|C3}}
C3
{{Lyon Transport icon|C26}}
C26