Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Random road networks: the quadtree model   What does a typical road network look like? Existing generative models tend
to focus on one aspect to the exclusion of others. We introduce the
general-purpose \emph{quadtree model} and analyze its shortest paths and
maximum flow.

19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat