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Table 1 Distance impedance coefficients

From: A multi-modal relative spatial access assessment approach to measure spatial accessibility to primary care providers

Distance impedance coefficient \(\varvec{\beta}\) Sub-zone 1 (0–10 min); weight at 5 min. Sub-zone 2 (10–20 min); weight at 15 min Sub-zone 3 (20–30 min); weight at 25 min Sub-zone 4 (30–60 min; bus only); weight at 45 min
Car
 140 0.836 0.200 0.012  
 155 0.851 0.234 0.018  
 170 0.863 0.266 0.025  
 185 0.874 0.296 0.034  
 200 0.882 0.325 0.044  
 215 0.890 0.351 0.055  
 230 0.897 0.376 0.066  
 245 0.903 0.399 0.078  
 260 0.908 0.421 0.090  
 275 0.913 0.441 0.103  
 290 0.917 0.460 0.116  
 305 0.921 0.478 0.129  
 320 0.925 0.495 0.142  
Bus
 440 0.945 0.600 0.242 0.010
 490 0.950 0.632 0.279 0.016
 540 0.955 0.659 0.314 0.024
 590 0.959 0.683 0.347 0.032
 640 0.962 0.704 0.377 0.042
 690 0.964 0.722 0.404 0.053
 740 0.967 0.738 0.430 0.065
 790 0.969 0.752 0.453 0.077
 840 0.971 0.765 0.475 0.090
 890 0.972 0.777 0.495 0.103
 940 0.974 0.787 0.514 0.116
 990 0.975 0.797 0.532 0.129
 1040 0.976 0.805 0.548 0.143