How to reset the transform.Rotation position

Unity Engine
1

Hi!

So I’m doing a Mario Kart game and I’ve run in to a bit of a problem. Sometimes when I crash into stuff i flip over. This is a problem since I can’t reset it. So I was wondering how to do that.

What I need is how to by pressing (in this case) “R”, get your “Kart” to ur standard rotation so u stand with ur feet on the ground, so to speak. And at the same time you need to reset the speed you have to 0 so you can’t “cheat” and avoid for instans like a Banana.

Current movement script

using UnityEngine;
using System.Collections;

public class Acceleration : MonoBehaviour {
   
    //Starting Speed which is Standby
    public float startSpeed = 0.0F;
    //Top speed
    public float topSpeed = 1.0F;
    //Speed at this moment
    public float currentSpeed = 0.0F;
    //Acceleration/s
    public float accelerationSpeed = 0.1F;
    //Turing speed
    public float rotSpeed;
   
    // Use this for initialization
    void Start () {
       
    }
   
    // Update is called once per frame
    void Update () {
       
        if (Input.GetKey ("a"))
        {
            this.transform.Rotate(0,-this.rotSpeed,0);
        }
       
        if (Input.GetKey ("d"))
        {
            this.transform.Rotate(0,this.rotSpeed,0);
        }
       
        if(Input.GetKey("w")){
           
            currentSpeed = currentSpeed + (accelerationSpeed * Time.deltaTime);
           
        }
        else
        {
            currentSpeed = currentSpeed - (deaccelerationSpeed * Time.deltaTime);
        }

        currentSpeed = Mathf.Clamp (currentSpeed, startSpeed, topSpeed);
       
        transform.Translate (0, 0, currentSpeed);
       
    }
}
2 
this.transform.rotation.x = 0;
this.transform.rotation.y = 0;
this.transform.rotation.z = 0;