Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Research on two-dimensional traffic flow model based on psychological
  field theory   In this paper, the influence of fan-shaped buffer zone on the performance of
the toll plaza is researched. A two-dimensional traffic flow model and a
comprehensive evaluation model based on mechanical model and psychological
field are established. The traffic flow model is simulated by creating
coordinate system.
  We first establish queue theory model to analyze vehicles when entering toll
plaza. Then, a two-dimensional steadily car-following model is established
based on psychological field for the analysis of vehicles when leaving toll
plaza. According to psychological field theory, we analyze the force condition
of each vehicle. The force of each vehicle is contributed by the vehicles in
its observation area and obstacles. By projecting these vehicles and obstacles
via the equipotential line in the psychological field, the influence on the
value and direction acceleration of following vehicles is obtained.
Consequently, the changes of each vehicle's speed and position are obtained as
well. Next, we establish simulation based on the states of vehicles and make
the rules of vehicle state-changing. By simulating the system, we obtain the
throughput of the toll plaza's input and output. Then we obtained the bearing
pressure on the road by the max throughput and the demand of the roads. Using
the number of cars in per unit area as the safety factor. Then a comprehensive
evaluation model is established based on bearing pressure on the road, cost and
safety factor.

33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin