The sentence is strange, though.. ' He, as well as me,..' maybe? Something like "He and I can both drive" is much more normal, I think..

Easy: It's because you said 'he': he... is. It doesn't matter what you add to that. :)

Accidental double post -- sorry. I hope my explanation helps!

Even though there are 2 people, "along with me" is not included because of its structure. "He" is the subject, so the verb only talks about him. If you said "He and I" then it would be "He and I are able to drive a car."

"Able" is an adjective. It requires a "be" verb. Examples: "I am able", "We are happy", "Fred is sleepy", "The party was fun". But your question is probably, "Why does 'is' follow 'me'?" In that case, as Sandra has pointed out, "along with me" is attached to the subject "he".