MoveTowards doesn't work correctly

In my game you control a car, while avoiding cars by switching lane. Sometimes in the game a nightclub will come and you have to hold in, to go to the nightclub. I have a boolean called goToNightclub and it becomes true by driving into a trigger object. When the goToNightClub is true, the car moves to a parkingspot using MoveTowards. ' But when i hit the trigger, my car only moves a little bit and not all the way to the spot. Can anyone see something i did wrong? The script is probably a little confusing, and just ignore the comments i made.

 #pragma strict
 
 
 var lane1 : Transform;
 var lane2 : Transform;
 var lane3 : Transform;
 var lane4 : Transform;
 var lane5 : Transform;
 var nightclub : Transform;
 
 var laneNr = 3;
 var  speed = 10;
 
 var goToNightclub : boolean = false;
 
 
 
 
 
 function Start () {
 //nightclub = GameObject.FindWithTag("nightClub");
 }
 
 function Update () {
 var step = speed * Time.deltaTime;
 
 
 if(goToNightclub != true) {
 if(Input.GetKeyDown("a")) {
 laneNr = laneNr-1;
 }
 
 if(Input.GetKeyDown("s")) {
 laneNr = laneNr+1;
 }
  }
 if(laneNr >= 5) {
 laneNr = 5;
 }
 
 if(laneNr <= 1) {
 laneNr = 1;
 }
 
 
 if(laneNr == 1) {
     transform.position = Vector3.MoveTowards(transform.position, lane1.position, step);
 }
 
 if(laneNr == 2) {
     transform.position = Vector3.MoveTowards(transform.position, lane2.position, step);
 }
 
 if(laneNr == 3) {
     transform.position = Vector3.MoveTowards(transform.position, lane3.position, step);
 }
 
 if(laneNr == 4) {
     transform.position = Vector3.MoveTowards(transform.position, lane4.position, step);
 }
 
 if(laneNr == 5) {
     transform.position = Vector3.MoveTowards(transform.position, lane5.position, step);
 }
 
 if(goToNightclub == true) {
 transform.position =  Vector3.MoveTowards(transform.position, nightclub.position, step);
 print("THOU");
 }
 
 
 
 }
 
 
     function OnTriggerEnter2D (other : Collider2D) {
     if(other.gameObject.tag == "EnemyCar") {    
         Destroy(gameObject);
     }
     
     if(other.gameObject.tag == "nightClub") {
     print("HEY");
     goToNightclub = true;
     
     //speed = 0;
 
     }
     
     }