for (int i = 0; i < numCarsInInput; i++)
    {
        bool checking = true;
        while (checking)
        {
            if (startDir == 0)
            {
                if (!carNorth.empty())
                {
                    cout << "Current direction: Northbound" << endl;
                    for (int j = 0; j < maxCar; j++)
                    {
                        cout << "Car " << carNorth[0] << " is using the intersection for " << carNorth[1] << " sec(s).\n";
                        carNorth.erase(carNorth.begin());
                        carNorth.erase(carNorth.begin());
                        checking = false;
                    }
                }
                startDir++;
            }
            else if (startDir == 1)
            {
                if (!carEast.empty())
                {
                    cout << "Current direction: Eastbound" << endl;
                    for (int k = 0; k < maxCar; k++)
                    {
                        cout << "Car " << carEast[0] << " is using the intersection for " << carEast[1] << " sec(s).\n";
                        carEast.erase(carEast.begin());
                        carEast.erase(carEast.begin());
                        checking = false;
                    }
                }
                startDir++;
            }
            else if (startDir == 2)
            {
                if (!carSouth.empty())
                {
                    cout << "Current direction: Southbound" << endl;
                    for (int m = 0; m < maxCar; m++)
                    {
                        cout << "Car " << carSouth[0] << " is using the intersection for " << carSouth[1] << " sec(s).\n";
                        carSouth.erase(carSouth.begin());
                        carSouth.erase(carSouth.begin());
                        checking = false;
                    }
                }
                startDir++;
            }
            else if (startDir == 3)
            {
                if (!carWest.empty())
                {
                    cout << "Current direction: Westbound" << endl;
                    for (int k = 0; k < maxCar; k++)
                    {
                        cout << "Car " << carWest[0] << " is using the intersection for " << carWest[1] << " sec(s).\n";
                        carWest.erase(carWest.begin());
                        carWest.erase(carWest.begin());
                        checking = false;
                    }
                }
                startDir = 0;
            }
        }
    }