US&S wigwags were also used by the CPR on its Canadian lines ; the last ones in use on the CPR believed to have been removed in Chatham , Ontario in the mid- 1980s .
US&S wigwags were also used by the CPR on its Canadian lines . 
 The last ones in use on the CPR are believed to have been removed in Chatham , Ontario in the mid- 1980s .