Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transportation Internet: Concepts, Models, and Architectures   Disruptive changes in vehicles and transportation have been triggered by
automated, connected, electrified and shared mobility. Autonomous vehicles,
like Internet data packets, are transported from one address to another through
the road network. The Internet has become a general network transmission
paradigm, and the Energy Internet is a successful application of this paradigm
to the field of energy. By introducing the Internet paradigm to the field of
transportation, this paper is the first to propose the Transportation Internet.
Based on the concept of the Transportation Internet, fundamental models, such
as the switching, routing, and hierarchical models, are established to form
basic theories; new architectures, such as transportation routers and software
defined transportation, are proposed to make transportation interconnected and
open; system verifications, such as prototype and simulation, are also carried
out to prove feasibility and advancement. The Transportation Internet, which is
of far-reaching significance in science and industry, has brought systematic
breakthroughs in theory, architecture, and technology, explored innovative
research directions, and provided an Internet-like solution for the new
generation of transportation.

4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin