Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Distributed Architecture for Real-time Hybrid Traffic Light Control in
  Urban Transportation Networks   A macroscopic model is proposed to depict the traffic dynamics involved in
urban traffic systems. The link dynamics are described based on the
cell-transmission model and bounded by the link capacities, while the flow
dynamics are proposed based on the discharge headways and saturation flow at
intersections. To fulfill the requirement of a closed-loop traffic light
control strategy, an approach to estimate the branching ratios at intersections
is proposed and simulations show that the convergence would be achieved under
constant cyclic flow profiles. Furthermore, a system partitioning approach is
proposed based congestion level identification, which is achieved via a machine
learning method and a hybrid traffic network control strategy is proposed to
integrate different traffic light control schemes together.

5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph