Dynamic class loading in namespaced PHP

dynamicClsLoadingNS.php

<?php
/* File Component/Package/Vehicle/BicycleModel.php */

namespace Component\Package\Vehicle;

class BicycleModel{
  //@ToDo: implement BicycleModel
}
?>

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<?php
/* File Component/Package/Vehicle/CarModel.php */

namespace Component\Package\Vehicle;

class CarModel{
  //@ToDo: implement CarModel
}
?>

-----------------------------------------------------------

<?php 
/* File Component/Package/Vehicle/VehicleFactory.php */

namespace Component\Package\Vehicle;

class VehicleFactory
{
  private $vehicleName;
  
  public function __construct($vehicle = 'Bicycle'){
    $this->$vehicleName = $vehicle;
  }
  
  public function getInstance(){
    $className = $this->$vehicleName . 'Model';
    return new $className(); //This will return \BicycleModel & NOT \Component\Package\Vehicle\BicycleModel
    /* This means it won't work as expected. We thought it will return a BicycleModel in the same namespace
    *  that is defined, But it didn't happen. Continue reading to see why */
  }
}