Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spatio-temporal structure of traffic flow in a system with an open
  boundary   The spatio-temporal structure of traffic flow pattern is investigated under
the open boundary condition using the optimal velocity (OV) model. The
parameter region where the uniform solution is convectively unstable is
determined. It is found that a localized perturbation triggers a linearly
unstable oscillatory solution out of the linearly unstable uniform state, and
it is shown that the oscillatory solution is also convectively stabilized. It
is demonstrated that the observed traffic pattern near an on-ramp can be
interpreted as the noise sustained structure in the open flow system.

27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org