Service Measure The service measure for basic freeway segments is density. Density, is typically measured in terms of passenger cars per mile per lane (pc/mi/ln) and therefore provides a good measure of the relative mobility of individual vehicles in the traffic stream. A low traffic stream density gives individual vehicles the ability to change lanes and speeds with relative ease, while a high density makes it very difficult for individual vehicles to maneuver within the traffic stream. Thus, traffic density is the primary determinant of freeway LOS.
q = uk (6.5)
where q = flow in veh/h, u = speed in mi/h, and k = density in veh/mi.
Density is therefore calculated as flow divided by speed. The following sections will describe how to arrive at flow and speed values for the given roadway and traffic conditions. Once the flow and speed values have been determined according to the given conditions, a density can be calculated and then referenced in Table 6.2 or Fig. 6.2 to arrive at a LOS for the freeway segment. Table 6.2 LOS Criteria for Basic Freeway Segments
A B C D E
FFS = 75 mi/h Maximum density (pc/mi/ln) 11 18 26 35 45 Average speed (mi/h) 75.0 73.9 68.3 60.9 53.3 Maximum v/c 0.34 0.55 0.74 0.89 1.00 Maximum flow rate (pc/h/ln) 825 1330 1775 2130 2400
FFS = 70 mi/h Maximum density (pc/mi/ln) 11 18 26 35 45 Average speed (mi/h) 70.0 70.0 66.7 60.4 53.3 Maximum v/c 0.32 0.53 0.72 0.88 1.00 Maximum flow rate (pc/h/ln) 770 1260 1735 2115 2400
FFS = 65 mi/h Maximum density (pc/mi/ln) 11 18 26 35 45 Average speed (mi/h) 65.0 65.0 64.0 58.9 52.2 Maximum v/c 0.30 0.50 0.71 0.88 1.00 Maximum flow rate (pc/h/ln) 715 1170 1665 2060 2350
FFS = 60 mi/h Maximum density (pc/mi/ln) 11 18 26 35 45 Average speed (mi/h) 60.0 60.0 60.0 57.1 51.1 Maximum v/c 0.29 0.47 0.68 0.87 1.00 Maximum flow rate (pc/h/ln) 660 1080 1560 2000 2300
FFS = 55 mi/h Maximum density (pc/mi/ln) 11 18 26 35 45 Average speed (mi/h) 55.0 55.0 55.0 54.7 50.0 Maximum v/c 0.27 0.44 0.64 0.85 1.00 Maximum flow rate (pc/h/ln) 605 990 1430 1915 2250
Note: Maximum flow rate values are rounded to the nearest 5 passenger cars.
Why Work with Us
Top Quality and Well-Researched Papers
Our writers have been trained on how to handle papers placed by our clients. The writer must read and understand before embarking on writing the papers. In case of any issue that needs clarification, writers are encouraged to ask the client or support.
Professional and Experienced Academic Writers
Our team comprises of the best writers and editors. We do thorough vetting during recruitment to make sure that our writers have the knowledge and experience we aspire in the team.
Free Unlimited Revisions
Our aim is to give the client the best outcome. If for some reason you are not satisfied with the wok done, you can ask the paper to be revised or rewritten. This will be done to your satisfaction with no extra charges.
Prompt Delivery and 100% Money-Back-Guarantee
We have writers who work round the clock. This helps in making sure that all our clients’ papers are delivered on time. If we have issues with the deadline, we will ask for extension. If its not possible, the money is fully refunded.
Original & Confidential
Our clients’ confidentiality is highly respected. We can never disclose our clients’ details to third parties. In the same regard, we strive to give our clients 100% original papers. We do not tolerate plagiarism from our writers.
24/7 Customer Support
Clients can reach us any time of the day, and any day of the week. There is a live chat, email or phone numbers to help in ease of communication.
Try it now!
How it works?
Follow these simple steps to get your paper done
Place your order
Fill in the order form and provide all details of your assignment.
Proceed with the payment
Choose the payment system that suits you most.
Receive the final file
Once your paper is ready, we will email it to you.
You should never be worried about your papers even in the middle of the night. Our team will work round the clock to deliver.
We have an able team that can deliver your work in the shortest time possible. The academic level or the type of work should never be a hindrance. Our highly competent support team is always around (24/7) to give you any assistance you may need.
Admission Essays & Business Writing Help
Do you need to be admitted in your dream institution but find it challenging to write an admission essay? Our team is in a position to write the best letter that will guarantee you an admission. We do as well write the best business proposals and reports.
Writing can be fun and enjoyable when everything has been done right. Writing is not just enough without proper editing and proofreading. We have a team of editors that ensure everything falls in place, whether its issues to do with grammar or referencing styles.
Once the paper has been done and submitted, that is not the end of it. You can always ask for amendment or improvement if you feel something has not been done right. Our team of writers and editors will gladly assist you to your satisfaction. Revision is free of charge.