This portfolio contributes 50 marks out of 100 marks. It consists of three independent assessment tasks. This assessment focus on weeks 1 to 6 content.

This assessment item relates to the unit learning outcomes 1, 2, 5 and 6. It develops students' ability to understand capacity analysis procedures for both roadways and intersections using current Australian Guidelines and Design Practices. Use of SIDRA software (intersection design software) is highly recommended when applicable.

Quizzes (10 Marks):

Complete three Moodle quizzes

More detail available in Moodle

Roadway Capacity Analysis Task (10 Marks):

Road Authority in Queensland is currently considering upgrading an existing suburban multi-lane road to a motorway in Brisbane due to severe traffic delays (based on the public complaints) during peak periods. As a traffic engineer, you were asked to collect data for the existing condition, analyse the existing condition and appropriate recommendation to improves capacity and level of service. Over several months.

More Detail information provided in Moodle

Intersection Capacity Analysis Task (30 Marks)

BACKGROUND

The intersection of Wellington Road and Kelletts Road is in the suburb of Lysterfield in Melbourne’s outer eastern suburbs. It is a “T” shaped intersection currently controlled by Give Way signs. There have been 11 casualty crashes in the last 5 years. The road authority is considering whether to upgrade the intersection to a roundabout or traffic signals.

YOUR TASKS

The senior traffic engineer responsible for this area has asked you for a report with sufficient analysis of different forms of intersection control for this site. You have been asked to assess the traffic and safety performance and consider all other matters relating to the choice of intersection control and write a report justifying your recommended treatment.

Provide a functional geometric design layout plan of the intersection for your recommended treatment – either traffic signals or a roundabout.

METHOD

Use SIDRA to analyse the following:

• the existing intersection with Give Way signs, with existing traffic volumes
• a roundabout
• traffic signals.

For a comparative check, also calculate the capacity and degree of saturation of the main movements at the existing unsignalised intersection, using manual methods.

You will need to analyse the intersection for the morning and afternoon peak hourly volumes.

For the traffic signals case, you need to analyse several options to determine the most efficient geometry and phasing that gives the best intersection performance. Some choices will also depend on your assessment of safety. Right turn movements may be fully controlled, partially controlled or filter only. You must present the SIDRA outputs in the Appendices to your report for at least 3 sensible variations.

Generally, assume that parameters are the same as SIDRA defaults. However, these may be modified if this would result in a more realistic assessment.

More detail available in Moodle

The marking matrix shall be based on the content consisting of the following principles. Each sequential step shall be allocated marks proportionately

1. Accuracy of Input parameter for each computation step with appropriate unit. Marks will only be awarded for correct input
2. Application of accurate methodology with appropriate referencing. Full mark will only be awarded for error free computational steps with appropriate explanation to be understood by an independent person.
3. Accuracy of answer with appropriate unit. Zero mark will be awarded with error in either Input or methodology.
4. If answers to any preceding steps are inaccurate. Partial mark be awarded for subsequent answers.

Additional information should be obtained from the Moodle Unit web-page

This assessment item relates to the unit learning outcomes 3, 4, 5 and 6. It develops students' ability to understand Australian pavement design system, materials and tests and design of alternative pavement configurations (flexible pavements, rigid pavements and structural overlays) using current Australian Guidelines and Design Practices. Use of CIRCLY software (pavement design software) is highly recommended when required.

• Quiz (5 Marks)

  Complete quizzes online.

  More details avialable in Moodle

  Laboratory Task (10)

  • You will complete the practical activities and the laboratory report as a team.
  • On-campus students will complete the practical activities between Weeks 5 and 9 of term.
  • Each team should check their schedule timetable as shown in Moodle
  • Distance students will complete the practical activities during the Residential School in Week 8.
  • All teams will upload a single team report due as per the Unit Profile.
  • The required practical activities are as follows
  • Preparation disturbed soil sample for testing
  • Soil Compaction and density test AS1289.5.2.2017
  • Determination of the penetration resistance of a soil AS1289.6.3.2
  • Determination of the California Bearing Ratio of a soil AS1289.6.1.1
  • Lime demandof soil Q133

  Design Task 1: Flexible pavement design (25 marks)

  Geometric design, earth moving and subgrade evaluation of a new two-lane two-way road has been recently completed and now it is time for design of pavement in rural Queensland. A new flexible pavement is to be designed and you are tasked to develop flexible pavement alternatives for further consideration. The following are the project specific information supplied by the client (Road Authority in Queensland):

  

  • Two way total AADT=4000+(the last four digits of your student ID)/10
  • Pavement design period 30 years.
  • Project reliability 95%.
  • Lane width= 3.5m.
  • Directional distribution 60/40
  • Subgrade CBR value = 3 (if the last four digits of your student ID is < 3000), 5 (if the last four digits of your student ID is ≥ 3000 but < 6000) and 7 (if the last four digits of your student ID is ≥ 6000)
  • Heavy vehicles = 8% (if the last four digits of your student ID is < 3000), 9% (if the last four digits of your student ID is ≥ 3000 but <6000) and 10% (if the last four digits of your student ID is ≥6000)
  • Annual heavy vehicle growth is 1% throughout the design period
  • Other required information can be assumed within Australian Standard (Austroads Guides)

• Summarise and calculate required flexible pavement design input parameters (5 marks)
• Design the following flexible pavement alternatives using mechanistic or graphical methods (as applicable, appropriate or preferred!). You need to draw final design drawings for all cases (not to scale is acceptable but indicate all required dimensions and units of measurements). You must discuss/interpret everything you calculate or present.
• Alternative 1: Heavy duty unbound granular pavement with sprayed seal surfacing (5 marks)
• Alternative 2: Asphalt over granular pavement (AC14M & AC20M) (5 marks)
• Alternative 3: Deep strength asphalt pavement (AC14M & AC20M) (5 marks)
• Alternative 4: Asphalt over heavily bound (cemented) pavement (AC14M & AC20M) (5 marks)

Design Task 2: Rigid Pavement design (10 Marks)

For the same road location and information (described above in Design Task 1), Road Authority in Queensland also asked you to develop rigid pavement design alternatives.

• Summarise and calculate required rigid pavement design input parameters (2 marks)
• Design the following rigid pavement alternatives using analytical or graphical methods (as applicable or appropriate or preferred!). You need to draw final design drawings for all cases (not to scale is acceptable but indicate all required dimensions and units of measurements). You must discuss/interpret everything you calculate or present.
• Alternative 1: PCP pavement without concrete shoulder (4 marks)
• Alternative 2: CRCP pavement with concrete shoulder (4 marks)

The marking matrix shall be based on the content consisting of the following principles. Each sequential step shall be allocated marks proportionately

1. Accuracy of Input parameter for each computation step with appropriate unit. Marks will only be awarded for correct input
2. Application of accurate methodology with appropriate referencing. Full mark will only be awarded for error free computational steps with appropriate explanation to be understood by an independent person.
3. Accuracy of answer with appropriate unit. Zero mark will be awarded with error in either Input or methodology.
4. If answers to any preceding steps are inaccurate. Partial mark be awarded for subsequent answers.

Additional information should be obtained from the Moodle Unit web-page