| Variable | EX-EN | EN-EX Downstream | ||||||
| Coefficient | Standard Error | t-statistic | p-value | Coefficient | Standard Error | t-statistic | p-value | |
| Constant | 1.215 | 0.267 | 4.550 | 0.000 | 0.480 | 0.177 | 2.718 | 0.009 |
| CRASHRATE (EN-EX) | −0.359 | 0.146 | −2.463 | 0.017 | - | - | - | - |
| SHOULDER | −0.066 | 0.015 | −4.325 | 0.000 | −0.018 | 0.010 | −1.790 | 0.079 |
| MEDIAN | −0.020 | 0.009 | −2.105 | 0.039 |
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| AADT | 0.000001 | 0.0000005 | 2.429 | 0.018 | −0.0000006 | 0.0000004 | −1.744 | 0.086 |
| RADIUS | −0.00004 | 0.000018 | −2.382 | 0.020 | −0.00002 | 0.00001 | −1.979 | 0.053 |
| RMSE | 0.291 |
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| McElroy’s R2 | 0.605 |
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