Simplicity vs. accuracy. In this case, I'd vote for simplicity and leave the end at Exit 134. Yakra has a good point about odd endings that are temporary.
I agree. For among other reasons, that's my takeaway from the Arnprior drama, where we used interchanges as the ON 417 endpoint even with evidence like route markers indicating the route continued past the last interchange.
The Arnprior story played out mainly on the CHM forum, but its third phase was recounted here. While we were jabbering away about whether to place the endpoint at exit 180, I found that MTO went out and built a new exit 184. Later, mapcat spotted new exit 187. In both cases, we moved the west endpoint to the westernmost interchange.
