There's been a nationwide uptick in property crime during Covid, and while I agree that carjacking is odd at that time of day, my daughter was recently assaulted at a gas station at 5:45 am (and she said there were at least 6 people working together to beg money and block entries/exits to the convenience store at the gas station - all of them appeared to be tweakers). She goes to the same gas station all the time, and didn't give it a second thought that she was there way earlier than usual.
I should add that where I live, we know there's no point in calling police unless serious injury occurred (she was not seriously injured - it's a type of assault that is happening frequently to women here in California - and elsewhere, it's meant to intimidate, and then someone else comes up and asks for money). The group blocked her ability to get back into her car, so she had to go into the store, where the clerk then walked her out a locked exit and to her car. Even so, she was approached one more time by someone standing at her car window pleading for money, close enough that she feared she would hit them as she left...
Early morning crime is not uncommon for tweakers, apparently. I do think that the sheer lack of other people being around (all day long) gives criminals more opportunity. It's possible that Alan was the only person at a stoplight, for example - or that he did stop for gas and encounter trouble.