Caltrans PEMS highway sensor average flows by occupancy
Description
This data summarizes average vehicle flow as a function of occupancy for traffic sensor data available from CalTrans Performance Management System (PEMS).
It's useful because it shows the behavior of traffic in congested regimes, without requiring the preprocessing of several hundred GB of the raw data.
Open the pdf files to see what this data looks like.
Notes
First open the pdf files to see what this data looks like.
The following R command will load the data:
fd_shape = read.table("fd_shape.tsv"
, col.names = c("station", "right_end_occ", "mean_flow", "sd_flow", "number_observed")
, colClasses = c("integer", "numeric", "numeric", "numeric", "integer")
, na.strings = "NULL"
)
The columns are as follows:
- station: station ID from PEMS
- right_end_occ: right end of the occupancy bin where the means are observed. Ranges from 0 to 1
- sd_flow: standard deviation of vehicle flow in bin
- mean_flow: mean vehicle flow in bin
- number_observed: the number of vehicles in bin
Funding provided by: National Science Foundation
Crossref Funder Registry ID: http://dx.doi.org/10.13039/100000001
Award Number: 1650042
Files
fd_2clusters.pdf
Files
(4.5 MB)
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Additional details
Related works
- Is derived from
- https://github.com/clarkfitzg/pems_fd (URL)