Dragon Ball Specials - episode 1 - 07 Jun, 1988

It is Bulma's birthday and Goku tries to find his way to West City to get to her birthday party. On the way, he encounters a Tiger Thief on a log bridge that will not let him pass but Goku uses the Afterimage Technique which outsmarts him causing him to hang from the log. In the city, Master Roshi and Krillin are on their way to Bulma's birthday party but they seem to have gotten lost. While looking through the directions, they see a boy who is playing with his toy car almost get hit by a bear speeding in a truck. The bear manages to slam the breaks at the last second destroying the toy car but the kid still being safe. A Traffic Agent Lady quickly arrives to see if the boy is okay and tells him that he should be careful where he was walking or he would have ended up like the toy car, horrifying him. She also yells at the bear for driving really fast and not paying attention. After she informs them, Master Roshi and Krillin have her help them get to Bulma's House. Meanwhile, Goku who is also on his way to Bulma's party finds Suno at a freeway to ask for help to get to West City. She gets mad at Goku for recklessly crossing the street and helps him get there since she was going there to see her cousin, Shinseki. When they arrive at West City, Suno sees her cousin and her aunt and uncle. Shinseki almost gets run over when running into the street to go see them but Goku saves him with his Power Pole. The Traffic Lady shows up to inform the kid to not run into the street and teaches him and Goku about stoplights. When Goku finally arrives at Bulma's party he manages to eat all of the food not leaving any for everybody else. In anger, they all try to fight Goku. Goku runs out of Capsule Corporation with everybody else chasing after him but the Traffic Lady appears and blows her whistle making them all stop and not run into the street. (Source: Dragon Ball Wiki)