I am a 3L (almost grad). My commute was much shorter distance-wise than yours, but in a high-traffic metro-area. 1L and 2L, my commute was 1 hour to 1:15 each way, and on particularly bad days could be 2 hours one way. This year, I moved a bit farther from school, but was able to schedule my classes to avoid a rush hour commute for the most part and reduced commuting time to 45 minutes to 1 hour each way.
If your commute will be in the 1-1:15 range, it is definitely workable. If the commute is much longer than that, during rush hour when you will be forced to commute during 1L, you may want to reconsider. It really will be a quality of life question, however, rather than determining your ability to be successful in school.
In terms of my school time commitment, during 1L law school was approximately a 50 hour/week commitment during the bulk of the semester and 60 hours/week right before exams. That meant that I tried to do about 5 hours of studying, outside of class, every day. With excellent time management skills, (which I'm sure, as a mom, you have) you should probably be able to do the bulk of this in between classes during the week.
I ended up using the car time as telephone time (with a hands-free device of course). I didn't really mind driving, so I did my best to use the travel time to decompress from school.
I hope this is helpful.