Further up the track we'd see a lot of stationary westbound trains, presumably waiting for the work to finish.  There were a lot of diggers zooming up the line.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/54741099@N00">Andrew Bowden</a> from London, United Kingdon
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/bods/5999043481/">Maintenance vehicles on the Canadian National</a>