Exercise 5: Editing Superelevation Parameters Graphically

In this exercise, you will use grips in a superelevation view to modify the superelevation cross slopes and critical station values.

This exercise continues from Exercise 4: Adding and Modifying Superelevation Stations.

Examine the grips

1. Open Align-Superelevation-5.dwg, which is located in the tutorials drawings folder.
2. In the Curve.4 portion of the superelevation view, click any of the red or blue lines.

   A series of grips appears at each of the superelevation critical stations along each line, as well as on the superelevation view. You will learn the purpose of the grips later in this exercise.

3. Press Esc.

Move a critical station graphically

1. Near station 0+900.00, Ctrl+click the green Shoulder text.

   Only the grips of the selected superelevation region are displayed.

2. Hover the cursor over the grip at station 0+908.44.

   The cursor snaps to the grip, and a menu of options is displayed. You can use this grip to either change the station value, or add or remove a critical station.

3. Select Move End Normal Shoulder.
4. Move the grip to station 0+900.00. Click to place the grip.

   The transition in region is updated.

   Note:

   The new station value is also shown in the Superelevation Tabular Editor and Superelevation Curve Manager.

5. Press Esc.

Remove or apply curve smoothing

1. Pan to the transition out region of Curve.4.
2. Near station 1+147.69, Ctrl+click the light red curve.
3. Hover the cursor over the grip at station 1+148.59.

   The cursor snaps to the grip, and a menu of options is displayed. You can use this grip to change the cross slope at this critical station, remove the grade break, or remove curve smoothing.

4. Select Remove Curve Smoothing.

   The curve is removed from the grade break.

   Note:

   You may use the same process to add curve smoothing to a grade break.

5. Press Esc.

Change the cross slope at a superelevation critical station

1. At station 1+148.59, hover the cursor over the grade grip.

   When a grade grip is cyan, a grade break exists at the current location. Like other cyan grips in a superelevation view, a menu of options is displayed.

2. At station 1+116.45, hover the cursor over the grip.

   When a grade grip is gray, the current location has a consistent grade. Because no grade break is present, the only option is to change the cross slope.

3. Click the grip to make it active.
4. Enter 1.5.

   Notice that the grip color is now cyan. This happened because you created a grade break at the current location.

Change the cross slope between superelevation curves

1. Pan to the left until you see the grip near station 1+000.00.
2. Hover the cursor over the grip.

   The cursor snaps to the grip, and a menu of options is displayed. You can use this grip to change the cross slope of either one or both of the shoulders or lanes between the previous and next superelevation critical stations. This grip is available in sections where lanes or shoulders are fully superelevated, as well as on tangents that are between curves.

3. Select Move Both Left and Right.
4. Enter 4.

   The cross slopes of both the left and right shoulders are updated.