Information/resources/tips for the Transportation and Warehousing industry?

I'm interested in learning more about transportation and warehousing (or, maybe, logistics in general), but I'm finding there's not a lot of "obvious" sources for actually learning about these industries. I'm trying to get in contact with people in the industry now to talk with them about it, but I'm curious if anyone has any pointers they'd want to share for this.

I'm specifically focusing on smaller logistics companies ($1m to $50m revenue) in the US in the context of acquiring such a business. I'm trying to get a grip on what day-to-day, week-to-week, month-to-month, year-to-year, etc., operations look like, as well as what typical financials look like. Basically anything to help me navigate these conversations with people in this industry.

Thanks!