CTC 440: LAB 4 (Vertical Alignments)

Using the example project:

1. Cut the original ground profile along the existing horizontal alignment from lab 3 (refer to below steps).

2. Recreate the existing vertical profile.

3. Compare grades, headlight sight distances and stopping sight distances to the design criteria from lab 2.

4. Summarize what you have done in a professional report:

· Briefly describe the project

· Briefly summarize the steps you used to recreate the vertical alignment.

· Compare the SSD/HSD and grades of the existing curves to the design criteria (from lab 2) by providing a summary table(s) showing Curve #, PVI Station, HSD/SSD, grades, and design criteria for grades and sight distance.

· Provide a printout of your vertical alignment in an appendix, and include graphics of your vertical alignment. Label the curves on the graph and label the printout with the same numbers. The idea is to provide a graphic which quickly shows which vertical curves do not meet the design criteria.

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INROADS - Vertical Alignment

Step 1: Start Inroads

Use xxwork.dgn as a working file. This file is a 3d file.

The basemap is attached as a reference file. Go to Microstation: File, Reference to display the reference file.

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Step 2: Load the DTM

File, Open, *.dtm

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Step 3: Load Geometry File

Click on Geometry Project and hit Reset Button

Open xx.alg

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Step 4: Cut Original Ground Profile (if not done already)

Evaluation, Profile, Create Profile

Highlight the project .dtm, hit Apply, and identify location with a data point

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Step 5: Create New Vertical Alignment

Click on your horizontal alignment and hit Reset Button

File, New, Geometry, Vertical Alignment, Apply

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Step 6: Define Vertical Curve PI's

Right click, Customize, Vertical curve set, 1^st box (add PI)

Input PI's graphically. Use microstation to find the approximate PI’s

Remember to click apply on the filter box.

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Step 7: Add Vertical Curves

5^th Box (define curve)

Notes: Hit "apply" and accept overall solution. You can also change station and elevation in this box

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Step 8: Print your Work

Geometry, Review Alignment, Vertical

Note: Add SSD values to your report

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Step 9: Save your Geometry Project

File, Save, Geometry Project

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Step 10: STOP

For the next lab we'll create a template of the existing typical section.