Personally, I am not able to answer your question. My colleagues would be better able to tell you which trains run during the day or at night. I know there are trains that run 24 hours a day. There may be some areas where there is a higher probability of a train running at a certain time.
The Lac-Mégantic tragedy is so sombre that it remains in our thoughts to this day. Many changes have been made since then, and safety has been strengthened in terms of systems, culture, equipment, training and everything else related to the operation of a train. However, I can confirm that the amount of oil transported by train has increased. The fact remains that 99.99% of all dangerous goods transported by train arrive at their destination without incident.
It is important to keep in mind that the success rate of transporting dangerous goods remains extremely high, and this is due to the implementation of several technologies and safety systems.