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es of this research is to find out the effects parameters of left turning accident rate, analysis the general factors and end up with a model which can be used popularly to analysis vehicle to vehicle accident rate.
To achieve these objectives first of all a literature review which is study the current researches and the previous literature inside of this area to see which is the main parameters and factors for left turning accidents, then analysis characteristics of them, all these analysis research is focus on vehicle to pedestrians accidents model. This model is contains too many human factors which are vary from different road users and even same road users under different situation or condition all of these subjective and objective factors are all unpredictable problems. So it is impossible to analysis it by some particular mathematics models.
Compare with vehicle to pedestrians accidents situation, the vehicle to vehicle situation can be seen a more stable and fixed model. It can be simulated and analsized by different accident rate analysis tools. During this research SafeNET is used to analysis the parameters and then come out with a mathematics model utilized by vehicle to vehicle accident rate analysis.
Field data collection and modification is need for implementation in SafeNET then we need validation and calibration for the simulation and analysis to determine the final useful accident rate mathematics model.
1.4 Outline
During this research there are five main parts which are literature review, introduce SafeNET and the data collection & modification for different chosen scenario sites, implementation of SafeNET, validation and calibration result and then end up with conclusion & possibility of future research area. This outline describes the contents of each upcoming chapter.
Chapter2: Literature Review
In the literature review chapter, the basic principles of left turning lane design, the general factors of left turning accident and characteristics of vehicle to pedestrians’ left turning accident compare with vehicle to vehicle accident are studied. Finally summarize the main factors and parameters which are effect and cause the left turning accidents.
Chapter3: Data Collection & Modification for Chosen Scenario Sites
Background, applications, advantages and disadvantages analysis of SafeNET compare with current other accident rate analysis tools are described in this chapter. What are the requirements data for analysis different type of intersection’s left turning accident and how these data can be collected are introduced as well. At the end, pick out the obviously incorrect data from the collected data for chosen scenario site.
Chapter4: Implementation of SafeNET

Chapter 5: Validation and Calibration Result
Chapter 6: Conclusion and Possibility of Future Research Area

2 Literature Review
2.1 Principles of left turning lane design
It is well know that for an intersection, if the left turning pass through frequency is high then the level of service of this intersection will be affected at the end the whole road’s level of service will be severely influenced. At the same time, accidents rates in the intersection also will increase with increased left turning pass through frequency compare with directly through traffic part. So the left turning traffic is become an significant part if require safety and effectively road environment. [1]
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