chicago_road — Chicago road network

Description

The road network of the Chicago region, USA, as a detailed representation prepared by the Chicago Area Transportation Study (CATS) for traffic assignment (the year of the underlying data is not documented), from the Transportation Networks for Research repository maintained by B. Stabler, H. Bar-Gera and E. Sall, which continues H. Bar-Gera's earlier "Transportation Network Test Problems" (TNTP) collection. Nodes are intersections or other points of the road network, or zone centroids (artificial nodes representing the 1,790 traffic analysis zones, where trips start and end), and directed edges are road links, including the artificial "centroid connector" links that join the zones to the road network. Some ramps that are one-way in reality are coded as bidirectional links, and three nodes (numbers 9365, 12976 and 12977) have no links. The origin-destination demand table that accompanies the network in the repository is not included. (This network is also part of the tntp entry, as chicago_regional.)

The network has the following properties:

(Node) is_zone: whether the node is a zone (zones are numbered first, and only the nodes from number first_thru_node, a graph property, on can be traversed by through traffic).
(Node) pos: the position of the node, in planar coordinates of unspecified units.
(Edge) capacity: the link capacity.
(Edge) length: in miles.
(Edge) free_flow_time: the travel time at zero flow, in minutes.
(Edge) b and power: the parameters of the link travel time function, travel time = free_flow_time * (1 + b * (flow / capacity)^power).
(Edge) speed: the speed limit (inconsistent with the free flow time on some links, according to the repository).
(Edge) toll: in cents.
(Edge) link_type: a link classification (undocumented).
(Edge) flow and flow_cost: the best known user-equilibrium link flow and the corresponding link travel cost, provided with the network.

Tags

Transportation Roads Weighted Metadata Spatial

Added

2020-08-11

Citation

Transportation Networks for Research Core Team, "Transportation Networks for Research." github.com

Upstream URL OK

https://github.com/bstabler/TransportationNetworks/tree/master/chicago-regional

Upstream license

For academic research purposes only, https://github.com/bstabler/TransportationNetworks#license

Networks

Tip: hover over a column header for a description.

Column legend

$\left<k\right>$: Mean degree
$\sigma_k$: Standard deviation of the degrees
$\lambda_h$: Largest eigenvalue of the Hashimoto (non-backtracking) matrix
$\tau$: Random walk mixing time
$r$: Degree assortativity
$c$: Global clustering coefficient
$\oslash$: (Pseudo-) diameter
$S$: Relative size of the largest component
NPs: Node properties
EPs: Edge properties

Name	Nodes	Edges	$\left<k\right>$	$\sigma_k$	$\lambda_h$	$\tau$	$r$	$c$	$\oslash$	$S$	Kind	Mode	NPs	EPs	gt	GraphML	GML	csv
chicago_road	12,982	39,018	3.01	2.37	3.06	7577.38	-0.00	0.04	106	1.00	Directed	Unipartite			266 KiB	383 KiB	375 KiB	305 KiB

Ridiculograms^*

^* These are automatically generated force-directed visualizations, and can be quite meaningless for networks both big and small. They should not be taken seriously as sources of scientific insight. See here for a discussion.