It does appear as if this statement is true, and here are some outside resources that also verify it:
According to CNN, they interviewed a trucker, Michael Scherkenbach, who disclosed that nearly 50 members of the combined trucking crews (as there are two of them for transportation) received the six-figure bonus of $100,000. This is surprising to the members of the crew because a bonus is typically in the range of $5,000-$10,000, whereas this bonus appears as "life-changing." Here is the link for the article if you want to read more: CNN
As well, CBS News further confirmed the same information in their article according to Entertainment Tonight: the singer gave about 50 truck drivers $100,000. However, in this article it further states how Taylor Swift also gave bonuses to other crew members, so her dancers, musicians, lighting and sound technicians, and caterers. Here is the link for that article: CBS News
Since CNN, CBS News, and Entertainment Tonight all confirmed this information and seem to be verifying off of each other, I can honestly say that I think this statement holds true. No other articles on Google appeared to discredit this claim; all three of these news sites also hold credibility for themselves.