if (ringGraphics.roadway[ii].modified == false)
            {

// if the cell is one of the two at the turning point....

                if ((ii == 0 || ii == ringGraphics.numberCells/2) && ringGraphics.roadway[ii].turningDecision == 0) {

// decide if the vehicle is going to turn or not

//                    if (Math.random() > percentTurn)
//                        ringGraphics.roadway[ii].turningDecision = 1;
//                    else
//                        ringGraphics.roadway[ii].turningDecision = 2;

                    if (Math.random() > adaptiveness)
                    {
                        if (Math.random() > percentTurn)
                            ringGraphics.roadway[ii].turningDecision = 1;
                        else
                            ringGraphics.roadway[ii].turningDecision = 2;
                    }
                    else
                    {
                        if (ii == 0)
                        {
                            if (ringGraphics.currentVehicles1 >= ringGraphics.currentVehicles2)
                            {
                                if (Math.random() > percentTurn)
                                    ringGraphics.roadway[ii].turningDecision = 1;
                                else
                                    ringGraphics.roadway[ii].turningDecision = 2;
                            }
                            else
                                ringGraphics.roadway[ii].turningDecision = 1;
                        }
                        else
                        {
                            if (ringGraphics.currentVehicles2 >= ringGraphics.currentVehicles1)
                            {
                                if (Math.random() > percentTurn)
                                    ringGraphics.roadway[ii].turningDecision = 1;
                                else
                                    ringGraphics.roadway[ii].turningDecision = 2;
                            }
                            else
                                ringGraphics.roadway[ii].turningDecision = 1;
                        }

                    }
                }







// logic for if the manual turning button is pushed

                if (ii == 0 && turnLeftToRight == true)
                    ringGraphics.roadway[ii].turningDecision = 2;
                if (ii == ringGraphics.numberCells/2 && turnRightToLeft == true)
                    ringGraphics.roadway[ii].turningDecision = 2;

// decide what the destination cell is, depending on if the vehicle is turning or not

                if (ringGraphics.roadway[ii].turningDecision < 2)
                    next = ringGraphics.roadway[ii].nextCell;
                else
                    next = ringGraphics.roadway[ii].turningCell1;

// if the cell is occupied, then add this to the time of vehicles in the system

                if (ringGraphics.roadway[ii].occupied == true) {
                    vehTimeTraveled++;
                    if (ii < ringGraphics.numberCells/2)
                        vehTimeTraveled1++;
                    else
                        vehTimeTraveled2++;
                }


// move the vehicle if it can and add this movement to the total movement of vehicles in the system

                if (ringGraphics.roadway[ii].occupied == true && ringGraphics.roadway[next].timeEmpty >= minEmptyTime-1 &&
                    (ringGraphics.roadway[ii].cycle == 0 || ((ringGraphics.tt+ringGraphics.roadway[ii].offset) % ringGraphics.roadway[ii].cycle < ringGraphics.roadway[ii].green )))
                {
                    ringGraphics.roadway[next].occupied = true;
                    ringGraphics.roadway[next].timeEmpty = 0;
                    ringGraphics.roadway[next].modified = true;
                    ringGraphics.roadway[next].turningDecision = 0;
                    ringGraphics.roadway[ii].turningDecision = 0;
                    ringGraphics.roadway[ii].occupied = false;
                    ringGraphics.roadway[ii].timeEmpty = 1;
                    ringGraphics.roadway[ii].modified = true;
                    vehDistTraveled++;
                    if (ii < ringGraphics.numberCells/2)
                        vehDistTraveled1++;
                    else
                        vehDistTraveled2++;
                }

// if the vehicles change rings, then change the count of vehicles on each ring

                if (next == ringGraphics.roadway[ii].turningCell1 && ii == 0 && ringGraphics.roadway[ii].turningDecision == 0) {
                    ringGraphics.currentVehicles1--;
                    ringGraphics.currentVehicles2++;
                    turnLeftToRight = false;
                }
                if (next == ringGraphics.roadway[ii].turningCell1 && ii == ringGraphics.numberCells/2 && ringGraphics.roadway[ii].turningDecision == 0) {
                    ringGraphics.currentVehicles1++;
                    ringGraphics.currentVehicles2--;
                    turnRightToLeft = false;
                }

            }