tarrant_travel_times: Tarrant County Travel Time Matrix Example Data

In spopt: Spatial Optimization for Regionalization, Facility Location, and Market Analysis

Tarrant County Travel Time Matrix Example Data

Description

A dataset containing Census tract polygons, candidate facility points, and a pre-computed driving travel-time matrix for Tarrant County, Texas. Used for demonstrating facility location algorithms with real travel times.

Usage

tarrant_travel_times

Format

A list with four elements:

tracts

An sf object with Census tract polygons including GEOID, NAME, population, and geometry columns.

demand

An sf object with tract centroid points (demand locations) in WGS84 coordinates.

candidates

An sf object with 30 randomly sampled candidate facility locations in WGS84 coordinates.

matrix

A numeric matrix of driving travel times in minutes. Rows correspond to demand points, columns to candidate facilities. Unreachable pairs are set to Inf.

Details

The travel-time matrix was generated using r5r with OpenStreetMap road network data clipped to Tarrant County. Candidate facilities were sampled using set.seed(1983) for reproducibility.

Source

Census tract data from the American Community Survey via tidycensus. Road network from OpenStreetMap via GeoFabrik. Travel times computed with r5r.

Examples

data(tarrant_travel_times)

# Access components
tracts <- tarrant_travel_times$tracts
demand <- tarrant_travel_times$demand
candidates <- tarrant_travel_times$candidates
ttm <- tarrant_travel_times$matrix

# Use with p_median
result <- p_median(
  demand = demand,
  facilities = candidates,
  n_facilities = 5,
  weight_col = "population",
  cost_matrix = ttm
)

spopt documentation built on April 22, 2026, 9:07 a.m.