The Drummondville Sub between St. Hyacinthe, east of Montreal, and Quebec City is part of CN's main line between Montreal and Halifax, and Via Rail's Windsor to Quebec City Corridor. The limit for certain passenger trains on part of this line is a cool 100 miles an hour and CN likes to run two mile long freight trains between Joffre Yard, south of Quebec City, and Montreal. This neat program shows over 24 hours of action on this line in August of 2005. 65 minutes. The DVD on this program has the option of being watched with or without narration.