pointsman

from WordNet (r) 3.0 (2006)
pointsman
    n 1: a policeman stationed at an intersection to direct traffic
    
from The Collaborative International Dictionary of English v.0.48
Pointsman \Points"man\, n.; pl. {-men} (-men).
   A man who has charge of railroad points or switches. [Eng.]
   [1913 Webster]
    

[email protected]