1. On one approach of an intersection with fixed time traffic signal, vehicles arrival rate is 600 vehicles per hour. The effective green time for this approach is 30 seconds, the saturation flow of this approach is 1800 vehicles per hour and the cycle time of the intersection is 80 seconds.
a. Evaluate the performance of the signal design i.e. will all vehicles clear during the green time?
b. Recommend the changes to the green time for this approach to achieve an optimum signal design i.e. If there is surplus green time, then state its value.
c. Due to a traffic incident, the original saturation flow is reduced by 20%. Will there be any delay under the new situation based on the original design? How many vehicles will experience the delay?
d. Under a new strategic transport plan to divert some vehicles to other areas, the saturation flow has been reduced to 1300 vehicles per hour by reconfiguring the layout of the intersection. Under this condition how may vehicles will be delayed in each cycle?
In: Civil Engineering
how does the annual temperature range depend on latitude?
why does the annual temperature range depend on latitude?
In: Civil Engineering
1-S0 in an activated sludge process represents
_________________________ concentration.
2-X in an activated sludge process represents
___________________________ concentration.
3-Biomass present in the influent is a product of biomass
concentration in the influent multiplied by ______________
___________.
4-Hydraulic detention time is a ratio of ______________ and
_________________.
5- ___________________ represents the portion of microorganisms
discharged from the process.
In: Civil Engineering
Please write concrete specification in Performance approach
To make sure you understand what I mean, this is the 'Performance' approach for writing the specifications.
Performance (results) specifications Characteristics•
- Describe in detail the required performance or service characteristics of the finished product or system•
- Methods used to achieve desired results is left to the discretion of the contractor, but must be guaranteed
-Methods of testing and measurement, to evaluate the results, should be spelled out in the specifications.
In: Civil Engineering
In: Civil Engineering
1.What is a pre-bid subtrade proposal, and of what benefit is it to the contractor’s estimator?
a.To a general contractor?
b.To a subcontractor?
2.What is a pre-bid subtrade proposal, and of what benefit is it to the contractor’s estimator?
3.What are the benefits and disadvantages to a general contractor of having subtrades provide surety bonds?
In: Civil Engineering
A pumping well has four monitoring wells, MW1 is 20m, MW2 is 500m, MW3 is 600m, MW4 is 700m, and the pond is 950m from the pumping well. The drawdown measured at MW1 during the pumping test conducted at a rate of 0.240m3/min:
| Time (min) | Drawdown (m) | ||
| 0.083 | 0.033 | ||
| 0.167 | 0.074 | ||
| 1.000 | 0.221 | ||
|
|
||
| 4.000 | 0.358 | ||
| 120.000 | 0.694 | ||
| 360.000 | 0.816 | ||
| 1080.000 | 0.913 | ||
| 1440.000 | 0.941 |
T=0.195m2/min and S=1.32x10^-4
What drawdown is expected at the four monitoring wells after 5 years of pumping at 30 L/s?
In: Civil Engineering
In: Civil Engineering
Mix the aggregates given the results of sieve analysis test in Table 1 in appropriate proportions, show the granulometry curves of each aggregate and mixture in Figure 2, calculate the fineness modulus (FM) of the mixture.
|
Sieve Size (mm) |
31,5 |
16 |
8 |
4 |
2 |
1 |
0,5 |
0,25 |
|
A1(Passing) %P1 |
100 |
90 |
85 |
55 |
10 |
0 |
0 |
0 |
|
A2 (Retained, g) |
0 |
0 |
0 |
0 |
200 |
300 |
200 |
100 |
|
A3(100-%P3) |
0 |
60 |
95 |
100 |
100 |
100 |
100 |
100 |
In: Civil Engineering
Test 1: σ3 = 30 kPa, P = 0.45 kN, A = 0.01 m2, u = 10 kPa
Test 2: σ3 = 60 kPa, P = 0.70 kN, A = 0.01 m2, u = 20 kPa
In: Civil Engineering
Assignment will be prepared on any issue (It is up to you)
concerning occupational health and safety and your professional
field. For example
If you are a Civil Engineering student; investigate and report the
relationship between occupational health and safety and
construction Works.
approximately 5 pages document.
i need a report 5 page for relationship between occupational health and safety with civil engineering field
In: Civil Engineering
(a) DESCRIBE the reasons why concrete has to be pre-stressed before use as a load-bearing beam. [3 MARKS]
(b) EXPLAIN with DIAGRAMS how pre-stressed concrete is made. [5 MARKS]
(c) EXPLAIN why pre-stressed concrete loses its strength when subjected to excessive heat from a fire. [2 MARKS]
In: Civil Engineering
Describe the process of producing GFRC panels, illustrating your account with simple sketches.?
In: Civil Engineering
In: Civil Engineering
A 12 in. x 18 in. rectangular beam has an effective span of 20 ft. A dead load of 1500 lb/ft (includes self weight) and a live load of 4000 lb/ft is applied to the beam. The concrete and steel strengths are 4000 psi and 60000 psi respectively. Design and detail the shear reinforcement for the beam. Assume d is 2 inches less than h
In: Civil Engineering