Problems with AI traffic buses getting stuck because another bus. [SCRIPT, IMAGE]

Unity Engine
1

Hello, I am having a problem with my AI traffic vehicle buses. In the picture, the 2 buses are completly stopped, with neither of them moving. How do I prevent this?

AI trigger part of the script(not the whole thing):

function checkLightsAndCars() : System.Boolean {
			var hit : RaycastHit; 
			var distance : float = 2;
			
	if(Physics.Raycast(transform.position, transform.TransformDirection(Vector3.forward), hit, distance)){
		if(hit.collider.transform.name == "StopArea"){ //Did we hit the gameObject called "StopArea"
			EngineTorque = 0;
			inputTorque = 0;
			FrontLeftWheel.brakeTorque = 1000;
			FrontRightWheel.brakeTorque = 1000;
			rigidbody.velocity = Vector3.zero;
			TailLight.gameObject.active = true;
      }
 }
		else { //We haven't hit anything that will stop us moving
			EngineTorque = 100; //Return true so the car can move
		    FrontLeftWheel.brakeTorque = 0;
	        FrontRightWheel.brakeTorque = 0;
	        TailLight.gameObject.active = false;
	}
	
    var distance2 : float = 8;
    if(Physics.Raycast(transform.position, transform.TransformDirection(Vector3.forward), hit, distance2)){
    	if(hit.collider.transform.name == "AICar"){ //Did we hit the gameObject called "AmbientVehicle"
			EngineTorque = 0;
			FrontLeftWheel.brakeTorque = 10000;
			FrontRightWheel.brakeTorque = 10000;
			rigidbody.velocity = Vector3.zero;
		TailLight.gameObject.active = true;
    }
		else { //We haven't hit anything that will stop us moving
			EngineTorque = 110; //Return true so the car can move
		    FrontLeftWheel.brakeTorque = 0;
	        FrontRightWheel.brakeTorque = 0;
	        TailLight.gameObject.active = false;
		}
	}
}

Image:

2

You can just make them wait a few seconds and start moving backwards, with probably steering to a random side and also checking the back with a raycast, so that they can free themselves, and when the front is clear, they can just resume moving.