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VAC2072 HIGHWAY ENGINEERING 2014

ASSIGNMENT 3 VERTICAL ALIGNMENT AND SUPERELEVATION

Objective: This assignment develops students ability to design the vertical profile and cross sections for a

given road alignment.

Students will work in pairs on this assignment but notwith a student with whom you have worked on a

previous assignmentin this subject.

A 400m length of rural road is being designed from point A as shown on the attached plan at scale 1:2000

(CH 100.00) through point B (CH 300.00), the TS to a 150m spiral transition to a +400m radius curve,

ending (for the assignment) at Point C at Ch 500.00 (not shown)

At point A the RL of the road is to be 37.70 with an existing grade of -2.0%. At point C the RL of the road isto be 38.94 with a grade of +1.0%.

1. Design the vertical alignment of the road for a design speed of 110km/h. Draw an appropriate

longitudinal section showing lengths of all vertical curves and tabulate CL levels at 20m chainages fromCH100.00 to CH500.00. (20 marks)

2. Design the superelevation development and draw the edge profiles on a centreline profile (20 marks)

3. Determine and tabulate the cross section levels of points 1, 3 and 5 (shown below) at 20mintervals from

CH200.00to CH350.00. Note that the road has sealed shoulders (10 mark)

4. Determine the earthwork quantities at 20mintervals over the length of the road. ( Pavement depth can be

neglected. Fill batters 3:1 , Cut batters 1:1 plus appropriate drain). Tabulate your calculations and results.(15 marks)

5. The earthworks must be completed in 2 weeks and the equipment available are:

Excavators with bucket capacity 1.5m3Scrapers with carry capacity 5m3

Dump trucks with capacity 15m3

Determine the number of each type of equipment required to complete the earthworks in 2 weeks.

Note all your assumptions made in your calculations. (15 marks)

presentation 20 marks)

The Tender Box for this assignment closes at 2.00 PM Wednesday 24 September 2014 and counts for 10%of the semester assessment. The use of road design software and spreadsheets are encouraged but the

assignment must be submitted on A4 with an A3 drawing folded to A4. Five marks will be deducted for latesubmission on 24 Sep and 10 marks if received after 24 Sep. Submissions after 26 Sep may be rejected.

1 2 3 4 5Shoulder Traffic Lane Traffic Lane Shoulder

2.0m 3.5m 3.5m 2.0m

-3.0% -3.0%

Section at Point A

Note that final contribution to subject marks will be calculated by dividing assignment mark by 10 androunding to nearest whole number.