Looks like Jean and I are BOTH corresponding with Oscar on this one. I couldn't get him to stop by, but maybe Jean will be more persuasive. Here's what he said:

Joe,
    I wrote "Remember the Horse" for a CBC program forty years ago. Check with Doug MacDonald of the CBC, the producer. It was about the Queen E highway.
For my CD, "American Dreamer", I rewrote it as a memorial to Harry Chapin, a dear friend who died in an auto accident on the Long Island Expressway.   I'm proud of it.
"The Horse" is actually titled "Remember The Horse" and I'm happy to hear that it's being sung and amended in Canada. One of my Canadian songs, "Something To Sing About", was almost the national anthem.
Every Canadian of consequence knows the chorus.

                                                Oscar Brand

(posted with permission)