try in D3, copied down:
Code:
=INDEX({"10 kph";"5 kph centre";"OVERLOADED"},MAX(IF($A$3:$A$153=A3,MATCH($B$3:$B$153,{"10 kph";"5 kph centre";"OVERLOADED"}))))
Depending on your version of Excel you may have to
array-enter this formula using
Ctrl+Shift+Enter, rather then plain
Enter.