Premium Essay

Simplified Spot Speed Studies

In:

Submitted By Rakshith
Words 1362
Pages 6
TECH NEWS
TECHNOLOGY NEWS
September–October 2004
Iowa LTAP Roads Scholar Program Training Workshops Technology News Calendar Safety Circuit Rider Library Catalog Publications Better Mousetraps

Simplified spot speed studies
Editor’s note
This article is the first of five summaries of traffic studies described in the Handbook of Simplified Practice for Traffic Studies: (1) spot speeds, (2) traffic volumes, (3) sight distances, (4) crash analyses, and (5) school zone programs. The handbook was developed by CTRE and funded by the Iowa Highway Research Board (TR455). The handbook describes straightforward trafficstudy procedures to help local agencies “get their arms” around specific traffic-related questions or potential problems. Data collected from these studies can be critical to decision making and can help agencies communicate more effectively with community members and local officials. All procedures outlined in the handbook and described below follow national standards.

Figure 1. Example stopwatch spot speed study layout

Figure 2. Example radar meter spot speed study layout Spot speed studies are used primarily to determine the distribution of traffic speeds, or vehicle speed percentiles, at a specific location. These data help traffic engineers determine and/or evaluate traffic operations and traffic control practices at specific locations; establish design elements for roadways, pedestrian walkways, and bikeways; assess roadway safety questions; and make other traffic safety-related analyses.

Rules of thumb
For spot speed studies, a sample size of at least 50 and preferably 100 vehicles should be obtained. (Using multiples of 100 for the sample size simplifies calculations.) Data for weekday speeds should be not be collected on Mondays or Fridays because of potential differences in traffic patterns on those days (unless, of course, an agency

Similar Documents

Premium Essay

Isle Royale

...15 miles off of the northern shore of Lake Superior, just south of the border between Canada and the USA. If you had been standing in a similar spot by the lake in the early 1900s, you may have witnessed a small group of hardy, pioneering moose swimming from the mainland across open water, eventually landing on the island. These fortunate moose arrived to find a veritable paradise, devoid of predators and full of grass, shrubs, and trees to eat. Over the next 30 years, the moose population exploded, reaching several thousand individuals at its peak. The moose paradise didn’t last for long, however. Lake Superior rarely freezes. In the 1940s, however, conditions were cold and calm enough for an ice bridge to form between the mainland and Isle Royale. A small pack of wolves found the bridge and made the long trek across it to the island. Once on Isle Royale, the hungry wolves found their own paradise — a huge population of moose. The moose had eaten most of the available plant food, and many of them were severely undernourished. These slow-moving, starving moose were easy prey for wolves. The Isle Royale Natural Experiment The study of moose and wolves on Isle Royale began in 1958 and is thought to be the longest-running study of its kind. The isolation of the island provides conditions for a unique natural experiment to study the predator-prey system. Isle Royale is large enough to support a wolf population, but small enough to allow scientists to keep track of all of the...

Words: 1444 - Pages: 6

Premium Essay

Speed-Density Relationship for Arterial Roads

...INTRODUCTION 1.1 Background of study The primary function of any highway is the transportation of people and goods from its source across to its intended destination. The functional effectiveness of any facility as such should be to ensure it serves its designed capacity with the most of convenience and safety for the users and vehicles plying it. This would help improve the level of service of facility and overall see to it that the socio-economic importance of it is realised. Traffic engineering analysis has to be employed to study the characteristic traffic flow conditions of the highway. The speed, density and flow are the basic traffic stream variables that need to be studied together with their relationship with one another in the traffic stream. These variables are very much linked and their relationship would provide an indication of the level of usage and efficiency of a roadway system and provide transportation planners the basic data in the evaluation of the effectiveness of capacity improvement measures. Information on highway traffic conditions is usually collected by organising and conducting traffic surveys and studies. Traffic studies may be grouped into three main categories as inventories, administrative studies, and dynamic studies. Of these three the dynamic traffic studies involve the collection of data under operational conditions and include studies of speed, traffic volume, travel time and delay, parking and accidents. This study is made to evaluate current...

Words: 10806 - Pages: 44

Free Essay

Parameter Optimization for 3g Cellular Networks

...Technische Universität München Lehrstuhl für Kommunikationsnetze Prof. Dr.-Ing. Jörg Eberspächer Master’s Thesis Parameter Optimization for 3G Cellular Networks Author: Matriculation Number: Address: Email Address: Supervisors: Begin: End: TOH, Kok Liang 2706603 Felsennelkenanger 7, App S402 80937 München Deutschland tk_liang@hotmail.com Mr. Roger Abou Jaoude (LKN) Dr.-Ing. Christian Hartmann (LKN) 01. April 2006 01. October 2006 ii Abstract Parameter optimization, such as antenna tilting and CPICH power, can be used to adapt the traffic capacity of 3G systems to traffic demands which are varying in the space and time dimensions. The goal of this thesis is to investigate how parameter optimization can be implemented, both in the 3G cellular system’s initial planning stage to optimize the network for CAPEX saving as well as after the deployment of the network, to increase the capacity of the system. For this purpose, appropriate models, including the space and time domain dynamics of the traffic modeling the moving hotspot characteristics, have been integrated into a system simulation tool. Meta-heuristics techniques such as Tabu Search and Simulated Annealing have been implemented to solve this NP-hard problem. Results show that the existence of optimal configurations can have an achievable capacity gain of more than 30%. iii Acknowledgements This Master Thesis would not have been possible without the support of many people. I would like to express...

Words: 23323 - Pages: 94

Free Essay

Runner Kaplan

...power plants 78 pages, 42 pages Appendix Jaakko Mattila Electricity tariff, small hydroelectric power plant, Kaplan turbine, runner, adaptation mechanism, stress analysis, technical drawings ABSTRACT The final thesis deals with the design of the runner of a Kaplan turbine. It might be that due to the increasing of the electricity tariff in the last years small hydroelectric power plants become cost effective. Since the runner of a small hydroelectric power plant is quite small, it has to be reexamined if the hub of the runner provides enough room for a proper adaptation mechanism. For this purpose the main characteristics of the runner are determined. Then, important data such as the suction head, the occurring forces or the critical speed are established. After those data are known, a detailed stress analysis of the developed adaptation mechanism follows. The stress analysis shows that the mechanism to adjust the blades is able to withstand the occurring forces. Finally drafts of the runner and its parts are done. TAMPERE UNIVERSITY OF APPLIED SIENCES FINAL THESIS 1 (134) Environmental Engineering Timo Flaspöhler —————————————————————————————————————— TABLE OF CONTENTS ABSTRACT ....................................................................................................................................ii TABLE OF CONTENTS...

Words: 21412 - Pages: 86

Premium Essay

Auditing

...PERFORMANCE AUDIT REPORT ON THE MANAGEMENT OF TRAFFIC INSPECTIONS AND SPEED LIMITS THE UNITED REPUBLIC OF TANZANIA NATIONAL AUDIT OFFICE A PERFORMANCE AUDIT REPORT ON THE MANAGEMENT OF TRAFFIC INSPECTIONS AND SPEED LIMITS IN TANZANIA THE MINISTRY OF HOME AFFAIRS – TANZANIA POLICE FORCE AND THE MINISTRY OF WORKS A REPORT OF THE CONTROLLER AND AUDITOR GENERAL OF THE UNITED REPUBLIC OF TANZANIA i PERFORMANCE AUDIT REPORT ON THE MANAGEMENT OF TRAFFIC INSPECTIONS AND SPEED LIMITS THE UNITED REPUBLIC OF TANZANIA National Audit Office of Tanzania Vision To be a centre of excellence in public sector auditing Mission To provide efficient audit services in order to enhance accountablity and value for money in the collection and use public resources Our core values Objectivity Excellence Integrity Peoples Focus Innovation ii PERFORMANCE AUDIT REPORT ON THE MANAGEMENT OF TRAFFIC INSPECTIONS AND SPEED LIMITS Table of Contents Table of Contents........................................................................................iii List of Tables and Figures...........................................................................v Preface.........................................................................................................vii Terminology used in this report.................................................................ix Map of Tanzania showing regions covered in this audit........................x Acronyms and Abbreviations...

Words: 31054 - Pages: 125

Free Essay

Aa Bb Cc

...UNIT 1- CAR BODY DETAILS Cars can come in a large variety of different body styles. Some are still in production, while others are of historical interest only. These styles are largely (though not completely) independent of a car's classification in terms of price, size and intended broad market; the same car model might be available in multiple body styles (or model ranges). For some of the following terms, especially relating to four-wheel drive / SUV models and minivan / MPV models, the distinction between body style and classification is particularly narrow. Please note that while each body style has a historical and technical definition, in common usage such definitions are often blurred. Over time, the common usage of each term evolves. For example, people often call 4-passenger sport coupés a "sports car", while purists will insist that a sports car by definition is limited to two-place vehicles. Body work In automotive engineering, the bodywork of an automobile is the structure which protects: ⦁ The occupants ⦁ Any other payload ⦁ The mechanical components. In vehicles with a separate frame or chassis, the term bodywork is normally applied to only the non-structural panels, including doors and other movable panels, but it may also be used more generally to include the structural components which support the mechanical components. Construction There are three main types of automotive bodywork: ⦁ The first automobiles were designs...

Words: 18375 - Pages: 74

Free Essay

Aaaa

...Comprehension 1. (A) He can have more than four guests at his graduation. (B) His brother isn’t going to graduate this semester. (C) He didn’t know that Jane wanted to be invited. (D) He’s going to invite Jane. 2. (A) Listen to the traffic report on the radio (B) Take a later train. (C) Ron to catch the next train. (D) Check the weekend schedule. 3. (A) Deliver the notebook to Kathy. (B) Find out where Kathy put the notebook. (C) Ask Kathy to explain the chemistry notes. (D) Ask Kathy for the man’s notebook. 4. (A) The walk is shorter than the woman thinks it is. (B) The lecture has already started. (C) They won’t have a problem getting seats. (D) The lecture may be canceled. 5. (A) The woman should have studied French in Paris. (B) He didn’t study French in high school. (C) Living in Paris helped improve the woman’s language skills. (D) The woman must have had a good French teacher. 6. (A) Apologize to his roommate. (B) Give the notes to the woman. (C) Call the woman tonight. (D) Take the woman’s notes to his roommate. 7. (A) She doesn’t have time to talk to Dr. Foster. (B) She needs the additional time to finish her paper. (C) Dr. Foster hasn’t finished grading the papers. (D) She wants the man to help her with her paper. 8. (A) Phone the Cliffside Inn for a reservation. (B) Ask her parents to come a different weekend. (C) Call local hotels again in a few days. (D) Find a hotel again in a few days. 9. (A) Main her some information about the conference. (B) Drive her to the conference...

Words: 6370 - Pages: 26

Premium Essay

Forex Instrument

... In partial fulfillment of the requirements of for award of Master of Management Studies Through Atharva Institute of Management Studies under the guidance of Prof. Aditi Mahajan Submitted by Paras Gada MMS Batch: 2010 – 2012. DECLARATION I, Mr. Paras Gada of Atharva Institute of Management Studies pursuing Masters of Management Studies hereby declares that I have completed this project on “Foreign Exchange Market with Hedging Instruments” for the Academic period 2010 – 12. The Project has not formed the basis for award of any other degree, associates, fellowship or any other similar titles. This information submitted is true and original to the best of my knowledge. Place: Mumbai Date: 3rd April, 2012 Signature of the Student ACKNOWLEDGEMENT The present work is an effort to throw some light on ‘Foreign Exchange market with Hedging Instrument’ the work would not have been possible to come to the present shape without the able guidance, supervision and help to me by number of people. With deep sense of gratitude I acknowledged the encouragement and guidance received by Prof Aditi Mahajan, for completion of my project report. CERTIFICATE This is to certify that Mr. Paras Gada, a student of Atharva Institute of Management Studies, of MMS SEM IV bearing Roll No. 12 and specializing in Finance has successfully completed the project titled “To study Foreign Exchange market with Hedging Instrument.” under the guidance of Prof. Aditi...

Words: 10858 - Pages: 44

Free Essay

Modern Chip Components

...fetch (retrieve an instruction from cache); decode (figure out what the instruction does); execute (carry out the instruction); and write back (store the result). Each pipeline stage usually takes one clock cycle. Most modern processors have superscalar pipelines, which are two or more pipelines arranged in parallel. That way, the processor can issue and complete multiple instructions in each clock cycle. The processor may also rearrange the instructions at execution time to put them in a more efficient order. This procedure is called dynamic execution. Modern processors can operate at speeds above 1 GHz. To maintain this rate, the processor must fetch a new instruction every nanosecond. Unfortunately, the main memory system that holds the computer program needs as much as 70 nanoseconds to pull an instruction out of its memory banks and send it to the processor. Caches provide a solution to this speed mismatch. Caches are blocks of fast memory that temporarily hold instructions and data....

Words: 5800 - Pages: 24

Premium Essay

Operations Management

...Student 30991 Malak Rostom Masters of Business Administration Module 5 Operations Management Title Hotel-Dieu De France Beirut-Lebanon Word Count: 3,477 CONTENTS I- Executive summary 3-4 II- Introduction 4 III- Company Profile 4-5 IV- Problem and Processes Description 5-8 1- Problem definition 5-6 2- Patients flow model at hdf 6-8 V- patient Flow and Capacity Theories 9-12 3- Process mapping 10 4- theory of constraints 10-11 5- lean tools 11-12 VI- HDF processes evaluation from the capacity theories perspective 12-16 VII- Proposed changes and their effects on customer service 16-18 VIII- Final Recommendations and conclusion 19-21 IX- REFERENCE ...

Words: 4360 - Pages: 18

Free Essay

Information System Sample Final

...PART A (60 questions – 1 mark each). 1. Which of the following are types of Information Systems?: A) MIS, TPS, DSS B) URL, HTTP, XML C) HTML, ASCII, WWW D) UML, USB, SCM 2.When considering data and information,: A) data is a collection of unorganized facts and information is data that has been transformed into something useful B) data is unimportant and businesses should only consider information C) data is critical when developing a solution to a problem while information should be considered only occasionally D) data and information refer to the same thing 3. The Internet generates business value by: A) enabling the buying and selling of goods B) protecting domestic markets from foreign competition C) promoting trade barriers in areas of the world that are underdeveloped D) ensuring compliance of government legislation regarding foreign investment 4. You needed to purchase a new computer system for your office You have narrowed down your choices from several alternatives. This is an example of a/an _____. A) input B) output C) decision D) knowledge E) wisdom 5. Globalisation means: A) that modern businesses are using information technology to expand their market B) to find the lowest cost suppliers regardless of location C) to create 24 hour business days by shovelling work across time zones and nations D) all of the above E) none of the above 6. According to the text, in today’s work environment, it’s impossible to do knowledge work without: A) Technology B) Information C)...

Words: 2872 - Pages: 12

Free Essay

Is Negative or ‘Attack’ Advertising at Effective Tool in of Political Engagement and Mobilization?

...Is Negative or ‘Attack’ Advertising at effective tool in of Political engagement and mobilization? There are assault ads, conveying the simple message over and over, that Brand X, the rival, is a cheesy piece of goods, won’t hold up, has to be cranked by hand… This is the model for not just our commercial product sales but, rather more vigorously, for our political campaigns as well… we have gradually just gotten used to them. Its not so much that I am wonderful the candidate explains, as the opponent is a lying, cowardly, two faced cheat and con artist. (Pulitzer Prize winner and Washington Post columnist Meg Greenfield, 1995) Whether through print or television media, advertising affects behaviour. A key tool of political parties, it has been used to win support during critical governmental assessment or change, and engage the susceptible electorate to participate in the political process. Yet, where features such as wit, charisma or aptitude have been emphasized and admired, the intemperance of political campaigning has also drawn out a negative side, one that seeks to cast a damaging shadow on any opposition in order to attain the support of the majority. The types of political message given out by both politicians and the media vary in how they are constructed and what they intend to achieve, and despite widespread criticism surrounding its ethical fragilities, attack politics in particular have become a fundamental component of any political campaign and evidence...

Words: 3099 - Pages: 13

Premium Essay

Maglev Trains

...A seminar on Study of working of magnetic levitation trains. By Shubham Sharma Guided by Sagar Shinde Department Of Mechanical Engineering Pad. Dr. Dy Patil Institute Of Engineering, Management And Research Pad. Dr. Dy Patil Institute Of Engineering, Management And Research CERTIFICATE This is to certify that Mr. Shubham Sharma has successfully completed the seminar work entitled “study of working of magnetic levitation trains” under my supervision, in partial fulfillment of bachelor of engineering – mechanical engineering, by university of pune. Date: Place: Guide: Mr. Sagar Shinde Mrs. Amruta Adwant Guide Head, MechanicalEngineering, DYPIEMR Principal, SEAL DYPIEMR AKNOWLEDGEMENT With immense pleasure I am presenting this seminar report on “Study of working of magnetic levitation trains” ...

Words: 6212 - Pages: 25

Premium Essay

Research on Currency of Bangladesh

...ASSIGNMENT TWO | Research on the currency of Bangladesh | | GROUP MEMBERS:IFTESHAM ARA JAHAN 082604030FARIHA NOWSHIN HAQUE 1020276030MINHAZUR RAHMAN 081314030MUSA HABIB KISHAN 0930442030NUSRAT MINALLAH SHOSHI 0910283030SIDRATUL MUNTAHA KHAN 0920517530 | Table of Contents Analysis of Bangladeshi Taka (BDT) against US Dollar($) 3 Factors that influences BDT 5 Analysis of Macroeconomic variables 7 Income level 7 Fig: Income receipts of Bangladesh from 2005-2012in US dollar 8 Income payments (US dollar) in Bangladesh 8 Effects of inflation on income 9 Effects of interest rates on income level: 11 Theory of Interest Rate Parity and BDT 12 Theory of Purchasing Power Parity 14 Theory of International Fisher Effect against BDT 16 Regulations on foreign currency transfers/remittances 16 Analysis of investment opportunity for US-based MNC 17 Analysis of Bangladeshi Taka (BDT) against US Dollar ($) Exchange rates play a vital role in a country's level of trade. This is critical to almost every free market-oriented economy in the world. Numerous factors such as inflation, interest rates, current-account/trade balance, public (government) debt and political environment determine exchange rates and all are related to the trading relationship between any two countries. The exchange rate, measured as a number of units of local currency per unit of foreign currency, is the price of the...

Words: 4139 - Pages: 17

Premium Essay

Interest Rates

...INTEREST RATE RISK MANAGEMENT: DEVELOPMENTS IN INTEREST RATE TERM STRUCTURE MODELING FOR RISK MANAGEMENT AND VALUATION OF INTEREST-RATE-DEPENDENT CASH FLOWS Andrew Ang* and Michael Sherris† ABSTRACT This paper surveys the main concepts and techniques of recent developments in the modeling of the term structure of interest rates that are used in the risk management and valuation of interest-rate-dependent cash flows. These developments extend the concepts of immunization and matching to a stochastic interest rate environment. Such cash flows include the cash flows on assets such as bonds and mortgage-backed securities as well as those for annuity products, life insurance products with interest-rate-sensitive withdrawals, accrued liabilities for definedbenefit pension funds, and property and casualty liability cash flows. 1. INTRODUCTION The aim of this paper is to discuss recent developments in interest rate term structure modeling and the application of these models to the interest rate risk management and valuation of cash flows that are dependent on future interest rates. Traditional approaches to risk management and valuation are based on the concepts of immunization and matching of cash flows. These ideas were pioneered in the actuarial profession by the British actuary Frank Redington (1952). Interest rates have long been recognized as important to the risk management of insurance liabilities. Recent developments have incorporated a stochastic approach to modeling interest...

Words: 18994 - Pages: 76