I think it is a mortal sin if you are driving to endanger the lives of others
I think we need to consider intent, here. Speeding, at least as I do it (

) is because I’m late or rushing to get somewhere. I can’t recall a time when I have decided “I’m going to speed to see if I can cause an accident and potentially endanger a life”. Of course, should you actually harm someone through your speeding, you bear culpability no matter what your original intention was or wasn’t. But I believe this falls under venial sin rather than mortal sin; one that separates you from God, potentially forever.
This is a prudential matter that you really must take seriously, but I don’t think you need to confess
I second this
Didn’t know that; VERY interesting.
I confess to these, as well

I’ve found that using a phone cradle, Google Speak function and cruise control have been quite helpful in this area. Calling people bad names, taking the Lord’s name in vain and the occasional “Jersey smile”…these I still struggle with
I dont know what it is in the US.
Reckless driving, maybe? Comes with a hefty 5 points on your license…
they are seldom caused by big things…mostly tiny little inattentions.
Very, very true. And this goes back to the comment about prudence…even if these things are not technically mortal sins, do any of us really want to be responsible, even indirectly for harm to someone else or their property?
I think it is safer than being the guy that slows everyone down to the point where they’re all passing him and muttering imprecations as they go by.
Agreed…I see far more “reckless” behavior and near or actual collisions caused by someone going too slow (whatever that is defined by) than by people who are speeding.
From what he posted, it doesn’t sound like he is a menace and a high risk driver. I highly doubt most Confessors would take what the OP posted and call it “grave matter”.
That was my impression as well. If he goes to some of the priests I’ve had for confession, he may be told (fairly abruptly) that it is not necessary to confess that sin within the confessional and to do it at one’s daily reflection and Act of Contrition.