I've got balls

Ever since Grant was just little and he learned what a school bus was he has always wanted to ride one to school. We live on a corner and the middle school and the elementary school bus stop is right in front of our house so ever since we moved into our house two and a half years ago Grant could look out the window and see the bus. So at the begining of the school year he was so excited that he was going to a school that had a school bus and he asked me if he was going to be able to ride it. It was heart breaking for me to tell him no, because of my own insecurities. If you know me very well you know that I can be a little (or a lot) anal about some things. And Grant just happens to be one of those things. He is my one and only baby and I worry about him.
I was worried about him riding on the bus. First off, do you realize that those things dont even have seat belts. Also I dont know the driver and I dont think that he has my sons best interest at heart like I do. Grant is only 5 and very impressionable. He would be riding the bus with big bad mean 6th graders. I just know they will corrupt my very sweet little boy. Not to mention when he actually gets to school (that is IF he gets there in one piece) he has to get from the curb to his classroom all by himself. What if there is a kidnapper waiting for him as he gets off the bus and I never see him again? I wouldnt know he was gone until hours later when he doesnt come home from school. These are the horrible things that have gone through my very dilussional mind.
Grant's school is a 15-20 minute drive from our house. So I drive about 40 minutes twice a day, it always takes longer in the afternoon when I go to pick him up because I wait in the "line" until his teacher brings him right to my car and makes sure he is with HIS mommy and not some stranger! Isnt that nice of her? I am the only one she does this for.  That means I spend an hour and a half on transporting him to and from school, not to mention the gas.
I talked to some other mothers and I talked to his teacher and everyone has assured me that he will make it to and from school just fine if he rides the bus. So I grew some balls and we are going to try it.Grant was so thrilled when I told him. I have gone over all the bus rules, stay seated at all times, no yelling, keep your hands and feet to yourself, stay seated at all times (cause those things dont have seat belts you know) Monday morning I am going to walk out to the curb with him and when the bus comes I am going to introduce myself to the stranger who will now be in charge of getting my baby to school safely. I will hug him and kiss him and tell him how much I love him. And then I will probably cry as they drive away. And I know that for the next three hours or so I will worry, I might even call the school to make sure he arrived there safely. Im kidding I wouldnt want them to know how crazy I really am. We'll see how it goes.
 Has anyone else had this big of a problem letting go of their kids?