How do I find out freight train schedules in Houston, TX?

We're looking at moving to a residential area that is not too far from a freight rail line. I'm concerned and was wondering whether the freight trains will pass through late at night. I'd like to find out more information what the schedule would be like during the day as well.
Update: What i'd like to know is whether they've rules such as not running the train between 8 pm to 6 am or the least, not blaring the horn between those hours.
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