At 2:38 pm on Thursday, April 17th, I was driving southbound on a street and I had just picked up my daughter from school. There were a lot of cars since school just got out. I was behind a car approaching a light going less than 10 miles an hour and braking lightly, then all of a sudden, the ABS system kicked on and my car jerked and vibrated violently forward for about 5 seconds and would not stop. I thought I was going to hit the car in front of me. Finally, I felt the brakes work normally and was able to come to a complete stop. There were no collision warnings or beeps even though I was very close to the car in front me.