HW8 solutions.docx - CAE419 Introduction to Transportation...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
CAE419 Introduction to Transportation Engineering and Design Semester Fall 2015 Homework 8: Public Passenger Transportation 1. Note: The data pertains to a three-hour peak Consider Route AB 1) Peak demand R c =720/3=240 passengers/hr Headway h min =60*C t /R c =60*(50+25)/240=18.75min. use 19 min 2) Cycle time T=2(t 0 +t 1 )=2*(40+15)=110 min 3) Fleet Size N t =T/h min =110/19=5.79, use 6 buses. 4) Revised Cycle Time T’=6*19=114 min 5) Commercial Speed Vc=120*L/T’=120*12/114=12.63 mph Consider Route CD 1) Peak demand R c =600/3=200 passengers/hr Headway h min =60*C t /R c =60*(40+25)/200=19.5min. use 20 min 2) Cycle time T=2(t 0 +t 1 )=2*(40+10)=100 min 3) Fleet Size N t =T/h min =100/20=5, use 5 buses. 4) Revised Cycle Time T’=5*20=100 min 5) Commercial Speed Vc=120*L/T’=120*9/100=10.8 mph 2. q = 0.5 ×VOT ×b OC×c = 0.5 × 15 × 640 80 × 90 60 = 6.32 bus / hr h = 1 q = 0.158 hr = 9.487 min h is less than policy headway. 640 50 = 12.8 bus hr > 6.32 bus / hr Therefore, the optimal frequency is 12.8 bus/hr, and the optimal headway is 60/12.8 = 4.69 min. 3. Deceleration d = 5 ft/sec 2 Safety factor K=1.5
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern