Construction Management
5th Edition
ISBN: 9781119256809
Author: Daniel W. Halpin, Bolivar A. Senior, Gunnar Lucko
Publisher: WILEY
expand_more
expand_more
format_list_bulleted
Concept explainers
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
=
a2+
Assume an origin is connected to a destination with two routes. Assume the travel time of each
route has a linear relationship with the traffic flow on the route (t₁ = α₁ + b₁x₁ ; t₂
b2x2). Determine under what condition (e.g. a relationship among the parameters of the
performance functions) tolling cannot reduce the total travel time of the two routes.
A suburb has 2000 households. The council hired two transport consulting companies to
predict the generated work trips from within the suburb after building a few residential
complexes. The new buildings will increase the number of households to 2500. The following
information is provided:
Type
Household Size
Household Count
Projected Household Count
1
1
500
800
2
2
800
900
3
3
700
800
Each company has conducted different travel surveys from 200 households based on different
sampling methods. The work trip generation models are as follows:
Company A: T₁ = -0.1 + 0.8 (household size)
Company B: T₁ = 0.1 + 0.5 (household size)
a.
If the total number of current work trips is 2700, which model should be used for prediction?
Why?
b. What are the possible reasons for the difference between the two models?
C.
As a transport engineer working for council, propose a new and more accurate model based
on Companies A and B models.
d. Based on the new model in Part C, predict the number of work…
Consider the following static route choice problem where 110 vehicles travel from point A to
point B. The corresponding travel time (in minutes) of each link is as follows:
t₁ = x1; t₂ = x2 + 20; t3 = x3 + 10; t₁ = 3x4
where x; denotes the number of vehicles that choose link i.
Find the number of vehicles that travel on each link when
a. The user equilibrium condition (UE) is satisfied, where vehicles select the route with the
minimum travel time; and
b. The system optimum condition (SO) is satisfied, where the total travel time is minimised.
C.
Report the total delay savings when satisfying SO instead of UE.
2
A
B
3
4
Chapter 18 Solutions
Construction Management
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- It is known that 5000 automobile trips are generated in a large residential area from 12:00 PM to 1:00 PM on Saturdays for shopping purposes. Four major shopping centres have the following characteristics: Shopping Centre 1 2 3 4 Distance from residential area (km) 4 9 8 14 Commercial floor space (thousands of m²) 20 15 30 60 Using a Logit model (with logit parameter equal to 1), the following utility function is estimated for the residents' choice of shopping destination: U = -0.283 X1 + 0.172 X2 where X1 is distance from residential area (km) X2 is commercial floor space (thousands of m²) Determine the number of shopping trips to each of the four shopping centres. Are the signs of the parameter coefficients reasonable? Discuss.arrow_forwardTITLE: DESIGN OF SINGLY REINFORCED RECTANGULAR BEAMS USING STRENGTH DESIGN METHOD. PROBLEM: Design a rectangular concrete beam section for positive moment and negative moment for the loads (unfactored) and p values given. Show sketch of cross section, including bar size, arrangement and spacing. Use concrete weight = 236 kN/m³, fy = 414 MPa, f`c = 27.6 MPa, p = 0.5Pmax concrete cover = 40 mm, tie bar = 10 mm Ø.Deadload : w₁₁ = 90 kN/m Live Load: WLL = 40 kN/m and PLL = 3kN. Assume beam weight equal to 8 kN/m. PLL W = WDL + WLL +Selfweight of beam 3.5m 7 m 3.5m Use p =Pmax (SUPPORT ONLY) COMPUTATION: Required: 1. Factored Load 2. Required moment Mu, using NSCP 2015 load combination. a. at the left support b. at the mid-span c. at the right support 3. Design a singly reinforced rectangular beam: a. at the left support b. at the mid-span c. at the right support Use b=0.54d and 32-mm diameter bar. 4. Check adequacy: a. at the left support b. at the mid-span c. at the right support SKETCHarrow_forwardFor the truss and loading shown given that thedistances AD=DG=12, BE=EH=12, and GH=12, determine the forcesof each memberarrow_forward
- س 1 تم أخذ قرار استثماري من قبل احدى الشركات المتخصصة في مجال البيئة والطاقة بالدخول في مشروع انشاء ابنية مستدامة وثبتت الشركة رغبتها بالحصول على عائد سنوي ثابت مقداره 50,000 دولار لمدة ثمانية سنوات بالاضافة الى عائد يغطي سداد ايجار مقر الشركة مقداره 35,000 دولار كل اربع سنوات, فاذا كانت المصاريف التشغيلية السنوية 20,000 دولار و نسبة الفائدة 10% % ماهو المبلغ الواجب استثماره من قبل الشركة لغرض تحقيق هذه العوائد؟ س2/ احسب القيمة المستقبلية المكافئة ( Future worth value ) للمشروع الاستثماري المبينة بياناته الاقتصادية في ادناه رأس المال Investment Cost الفقرة تكاليف التشغيل السنوية Annual Operating Cost العوائد السنوية Annual Revenue عمر المشروع Useful life Interest rate نسبة الفائدة Inflation rate نسبة التضخم المبلغ ($) 800,000 30,000 150,000 10 years 12% 4%arrow_forwardResuelve el problema unoarrow_forwardA lagoon with volume 1,300 m3 has been receiving a steady flow of a non-conservative waste (rate constant= 0.19/day) at a rate of 80 m3/day for a long enough time to assume that steady-state conditions apply. The waste entering the lagoon has a concentration of 12 mg/L. A. What would be the concentration of pollutant in the effluent leaving the lagoon? B. If the input waste concentration suddenly increased to 110 mg/L, what would the concentration in the effluent be 8 days later?arrow_forward
- I dont know how to solvearrow_forwardThe BOD of a river just below a sewage outfall is 40 mg/L. At this point, the DO is at the saturated value of 9.8 mg/L. The deoxygenation rate coefficient is 0.22/day, and the reaeration rate coefficient is 0.9/day. The river is flowing at 10 miles/day. There are no other sources of BOD in the river. A. Find the critical distance downstream at which DO is at a minimum. B. Find the minimum DO.arrow_forwardA lagoon with volume 1,300 m3 has been receiving a steady flow of a non-conservative waste (rate constant= 0.19/day) at a rate of 80 m3/day for a long enough time to assume that steady-state conditions apply. The waste entering the lagoon has a concentration of 12 mg/L. A. What would be the concentration of pollutant in the effluent leaving the lagoon? B. If the input waste concentration suddenly increased to 110 mg/L, what would the concentration in the effluent be 8 days later?arrow_forward
- A lagoon with volume 1,300 m3 has been receiving a steady flow of a non-conservative waste (rate constant= 0.19/day) at a rate of 80 m3/day for a long enough time to assume that steady-state conditions apply. The waste entering the lagoon has a concentration of 12 mg/L. A. What would be the concentration of pollutant in the effluent leaving the lagoon? B. If the input waste concentration suddenly increased to 110 mg/L, what would the concentration in the effluent be 8 days later?arrow_forwardSolve for support reactions and member forces of trussarrow_forwardSolve for reactions and create shear and moment diagram.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Engineering Fundamentals: An Introduction to Engi...Civil EngineeringISBN:9781305084766Author:Saeed MoaveniPublisher:Cengage Learning
Traffic and Highway EngineeringCivil EngineeringISBN:9781305156241Author:Garber, Nicholas J.Publisher:Cengage Learning
Fundamentals Of Construction EstimatingCivil EngineeringISBN:9781337399395Author:Pratt, David J.Publisher:Cengage,
Residential Construction Academy: House Wiring (M...Civil EngineeringISBN:9781285852225Author:Gregory W FletcherPublisher:Cengage Learning
Construction Materials, Methods and Techniques (M...Civil EngineeringISBN:9781305086272Author:William P. Spence, Eva KultermannPublisher:Cengage Learning
Engineering Fundamentals: An Introduction to Engi...
Civil Engineering
ISBN:9781305084766
Author:Saeed Moaveni
Publisher:Cengage Learning
Traffic and Highway Engineering
Civil Engineering
ISBN:9781305156241
Author:Garber, Nicholas J.
Publisher:Cengage Learning
Fundamentals Of Construction Estimating
Civil Engineering
ISBN:9781337399395
Author:Pratt, David J.
Publisher:Cengage,
Residential Construction Academy: House Wiring (M...
Civil Engineering
ISBN:9781285852225
Author:Gregory W Fletcher
Publisher:Cengage Learning
Construction Materials, Methods and Techniques (M...
Civil Engineering
ISBN:9781305086272
Author:William P. Spence, Eva Kultermann
Publisher:Cengage Learning