• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Fieldwork Question: Which are more effective in promoting vehicular traffic flow in Nairobi: roundabouts or unregulated intersections?

Extracts from this document...

Introduction

IB HL Geography Internal Assessment Field Study Hanna Ewell HL Geography Mr. Lavender May 21, 2012 [word count:2149] Table of Contents: A Fieldwork question and geographical context page 3 B Methods of investigation page 4 C Data pages 5-7 D Written analysis pages 5-8 E Conclusion page 9 F Evaluation page 10 Part A Overview Fieldwork Question: Which are more effective in promoting vehicular traffic flow in Nairobi: roundabouts or unregulated intersections? Hypothesis: At rush hour, the unregulated intersection will be severely blocked because people force their way through and nobody waiting their turn. Roundabouts, especially the United Nations Avenue/Ruaka Road one, will work more effectively, up to a certain level of traffic, after which the same problem will arise. Geographic context: Over the past few years, traffic in Nairobi, the capital of Kenya, has increased tremendously due to the rapid increase in the ownership of cars. This has led to problems such as congestion, depletion of green space and noise largely contributing to the overwhelming swell in environmental and urban stress. Nairobi?s geography, which is made up of numerous crests and troughs, has made it very difficult to build convenient connecting roads in order to eliminate some of the congestion problems. ...read more.

Middle

and 7:18 (sharp increase) were most likely due to sudden changes in congestion levels during those one-minute periods. As flow rates are not determined by the exit of the vehicles from the intersection, random changes in the amount of cars that are able to come into or do not arrive at the intersection can only explain the anomalies. Although slight fluctuations are visible, the graph clearly shows that the number of vehicles entering the unregulated intersection stayed very similar throughout the observation period. The single anomaly in the very first observation at 8:00 am is not repeated. This may mean that traffic further down the roads has become more congested, which means that the vehicles don?t have anywhere to go. This hypothesis would need to be tested with a longer period of investigation. The increasing number of cars coming into Nairobi is shown by the extreme difference in the percentage of cars versus other types of vehicles at both intersections. As Kenya becomes more economically developed, so do its inhabitants, especially those living in Nairobi. Becoming economically developed involves a higher employment rate, which in turn means more people wanting cars to get to those workplaces and being able to afford them. A large majority of relatively well-off Kenyans own more than one car, simply because they can afford to. ...read more.

Conclusion

What we could have done to eliminate this problem is have everybody write down their own data and then compile the data for each minute later on. Another negative aspect of our study is the fact that we measured traffic flow at two different times, which impacted the amount of congestion and also the total number of cars on the roads. We measured flow rates and transit times at the United Nations Avenue/Ruaka Road roundabout from 6:50 to 7:20 am, while observing the unregulated intersection between Peponi Road and General Mathenge Drive from 8:00 to 8:30 am. Although the time difference may not seem great, the differences in traffic flow shown on the graphs above were great due to our first observations being slightly before rush hour and our second observations slightly afterwards. In other cities this may not play a significant role in traffic flow, but here in Nairobi it definitely does! To eradicate this issue we could have measured traffic flow over two days, observing both intersections at the same time. If we were merely measuring congestion levels, we could have also made sure to measure traffic flow at the height of rush hour and then either well before or well after to see a clear difference. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Geography section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related International Baccalaureate Geography essays

  1. IB Geography HL Report - Long Hai

    Pham Ngu Lao is one of the famous street for the tourists, because there's lots of cheap hotels, restaurants and travel agency. The Pham Ngu Lao there's agglomeration for the tourism such as De Tham, Bui Vien. Methods I've got 3 kinds of data.

  2. Free essay

    An investigation into the underlying factors affecting infiltration rates and their impacts in a ...

    degrees Celsius, warmer than average and thus should increase the infiltration rate. This set of data can be justified to be an anomaly. Generally, these warmer conditions should have increased the rate of change because of the increase in evaporation.

  1. Geography Field Study - Delineating the CBD Antwerp

    In order to investigate this further, I have attempted to produce a map on the following page that would show a block-by-block (block = 200 meters) analysis of the varying land usage for each of the four-transects. The map gives us a better understanding of perhaps where the border of

  2. Geography fieldwork IA

    Since Switzerland is located in the heart Europe it has to make cross borders relations in order sustain economic balance. It can be known as a country that was brought up by internationalization through industrialism and commercial/retail sectors. It borders France, Italy, Germany, Liechtenstein, and Austria.

  1. Geography HCMC Fieldwork Report

    On the other hand, most of the backpacker hasn't got enough money to spend for $100 for a night rest. So they prefer to stay in Pham Ngu Lao. The average price of hotels that are located in Pham Ngu Lao is approximately $15 per night with air conditioning.

  2. Foreign Talent-Dilemma in Singapore. as we shall explain, illustrate and seek to convince in ...

    Citizenship is both a matter of pride and duty and nowhere is this more clearly illustrated than the National Service issue. On the perceived inequity of National Service, some pointed out that Singaporean males were disadvantaged by losing 2 years of their lives and also later, during their work years, when they were regularly recalled for in-camp training.

  1. Food aid: case study

    varieties, restocking of livestock and improved access to water and veterinary healthcare; � Training to prepare for and reduce the effects of disasters on vulnerable communities for example by establishing fodder and cereal banks; � Diversification of livelihoods through promotion of off-season vegetable farming, facilitating small businesses and provision of

  2. geography IB prep

    3 million thbe wells in Bengladesh alone � result: water-based diseases like bilharzia 5.) Exemplify the benefits of the Bureau of Reclamation's multipurpose dams along the Colorado river and its tributaries. � Hydroelectric powerplants at Hoover, Davis and Parker Dams generate nearly 6 billion kilowatt hours of electricity in an

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work