Реализация autoload на mvc

class Route
{
    static function start()
    {
        $controller_name = 'Main';
        $action_name = 'index';
        $routes = explode('/', $_SERVER['REQUEST_URI']);
        if ( !empty($routes[1])){   
            $controller_name = $routes[1];
        }
        if ( !empty($routes[2])){
            $action_name = $routes[2];
        }
        $model_name = 'Model'.$controller_name;
        $controller_name = 'Controller'.$controller_name;
        $action_name = 'action'.$action_name;
        $model_file = strtolower($model_name).'.php';
        $model_path = "application/models/".$model_file;
        if(file_exists($model_path)){
            include "application/models/".$model_file;
        } 
        $controller_file = strtolower($controller_name).'.php';
        $controller_path = "application/controllers/".$controller_file;
        if(file_exists($controller_path)){
            include "application/controllers/".$controller_file;
        } else {
            Route::ErrorPage404();
        }  
       $controller = new $controller_name;
        $action = $action_name;
        if(method_exists($controller, $action)){
            $controller->$action();
        } else {
            Route::ErrorPage404();
        }
    } 
    static function ErrorPage404()
    {
        echo "<img src='images/404.png' alt='404'>";
    }
}

    "autoload": {
        "psr-4": {
            "App\\": "app/"
        }
    },