CIV5704 - Road and Street Engineering - Engineering Assignment Help

Assignment Task

Rationale 
This assignment is designed to test your achievement of the learning objectives of Modules 1 to 4. 
Special instructions: 
Information provided is generally adequate. 
If any assumptions are required, those should be clearly stated. 
Students are encouraged to type their answers, thus, avoid hand-writing or photographed contents. The answers should be well set out and clearly shown all required calculations, estimations of parameters, etc. Present your working like the answers given for the study book examples or self-assessment questions in this course study books. 
Identify your assignment submission by naming your file according to your first name and surname. 
Assignment must be submitted by the due date via StudyDesk submission link as an attachment (word or pdf file). No Excel files will be accepted as a part of your calculations. 
No emailed, faxed, photographed submissions will be accepted. 
Penalty for late submission of assignment: 
Please note that the onus is on students to organise their affairs so that they can achieve the educational objectives of the course and submit assignments for assessment no later than the due date. 
If student did not apply for an extension with valid reason prior to the due date and submitted his assignment late, then under Section 4.2.4.3 of the Assessment Procedure, the examiner will apply a penalty for late submission to his/her assignment. 
Please note that taking leave to go on holidays will not be considered as a legitimate reason for a late submission. 
Question 1 (10 Marks) 
Speed data collected on an urban roadway has a standard deviation of ±4.8 km/hr. 
a) How many minimum spot speed data (sample size) should be collected, if an engineer wishes to 
estimate the average speed on the roadway at a 95% confidence level so that the estimate is within ±2 km/hr of the true average? 
b) If the estimate of the average must be within ±1 km/hr, what should the sample size be? 
Question 2 (30 Marks) 
The data below show spot speeds collected at a section of highway located in a residential area before and after introducing a new speed limit.
Question 3 (30 Marks) 
The following traffic counts taken on a rural primary road between 8:00 am and 11:00 am and 3:00 pm and 6:00 pm:
Question 4 (50 Marks) 
Using loop detectors on the pavement, a traffic engineer estimates that the jamming condition on a lane of a divided highway occurs when vehicles are spaced 11 metres apart (i.e. distance between front bumpers of successive vehicles in a lane). The speed at maximum flow is estimated to be 40km/h. Using the same traffic sensors and doing some analysis of traffic data, the engineer suspects Greenberg’s model applies to the traffic situation. a) Calculate the maximum flow per lane on this highway on a busy day of traffic. b) On a day the highway loop detectors registered an average spacing of ‘d’ meters between vehicles

Question 5 (20 Marks) 
The morning and evening traffic volume on the main road taken near a Stop sign is tabulated below. It is assumed that the arrival of vehicles can be described by a Poisson distribution. 
Vehicles at the STOP sign at an unsignalised crossing require a 7 seconds headway to cross the road or to merge with the ongoing traffic stream. 
Estimate the number of acceptable gaps that will occur in an hour on the main road for the stopped vehicles for morning and evening traffic flow condition. 
Question 6 (60 Marks) 
You are appointed as a Traffic Engineer to a city council in Australia. Soo after your appointment, you are requested to prepare a report on a city’s serious traffic-related problem and most suitable solution for it. The report should surface few traffic-related problems to highlight the serious one among them and its trajectory. In this process, you need to clearly define its contributing parameters to use them with your reasons. For this purpose, you need to collect actual data from a city, analyse the data to estimate key parameters and use them to support your arguments. Actual data can be obtained from various sources such as web-based resources or annual reports by the city council or by directly contacting officers working for transport planning/traffic management section of the council. After you identify the traffic-related problem and its trajectory, you must also consider a few possible remedial measures and/or infrastructure development projects to ease the problem. Then select a suitable solution or a project that can be used to solve the existing problem to a greater extent. Readers of your report should understand that your identified problem, as well as your justifications towards selecting suitable solutions, have strongly linked to the theoretical background, and Australian standards and/or best practices around the world. Therefore, use the latest references, and where required use citation of the sources as it would appear in the USQ’s recommended Harvard referencing system. Use the first letter of your first name to identify your city from the table below: 
1. Background: Introduce your study city, including its location, size and population. (100-200 words) 
2. Serious traffic problem: Analyse relevant data from your city to support your arguments. Highlight 
the most serious traffic-related problem and its trends and trajectories (500 – 600 words) 
3. Propose the most suitable solution/remedial action: Use your justification to identify a few solutions or a list of projects to ease the problem. Then select a most suitable solution or a project that can be used to solve the existing problem to a greater extent. Your proposed solution should support theoretical background, and/or best practices learned (300 – 400 words) 
4. Summary: Problem is concisely summarized. A set of solutions were considered. Identified and recommended a most suitable solution where knowledge from various resources have been included. (100 – 150 words) 
5. List of reference (no words count) 
A concisely typed report should have a maximum of 1350 words in length (not including Lis of references, Figure(s) which should still be part of your report). 
Hints 
Give your focus to a study city and NOT to a selected highway within the city. Suitable parameters need to be employed to highlight your arguments. For example, the following parameters could generally be used to highlight the increasing level of traffic congestion in a city: 
1. City’s population growth rate 2. Increases in traffic flow (AADT) to the city 3. Growth rate of daytime workers living in the city 5. Changes in average peak hour car occupancy (i.e., # of occupants /car) 6. Growth of daily commuters to city using private vehicles (e.g., Occupancy and AADT). 7. Increasing trend of travel time from a sub-urban area to the city centre 8. Growth of commuters using motorways 9. Average peak hour trip time within or crossing the city 10. Changes in average speed during peak hours over the recent years 12. Increases in registered motor vehicles in the city 13. Growth of fuel consumptions by the city’s motorists 14. Growth of city’s employment rate 15. Growth of land use for retail businesses 
Note: It is recommended to use reliable data to estimate at least THREE parameters listed above or similar parameters to support your arguments in highlighting the traffic problem. Use as many as relevant parameters from the list to highlight the traffic related problem, if required. You can also use a figure (not more than one) in your report to support your writeup. 

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