| Variable | EX-EN Upstream | EN-EX Downstream | ||||||
| MLR | 3SLS | MLR | 3SLS | |||||
| Coefficient | Standard Error | Coefficient | Standard Error | Coefficient | Standard Error | Coefficient | Standard Error | |
| Constant | 1.095 | 0.256 | 1.228 | 0.288 | 0.469 | 0.176 | 0.484 | 0.173 |
| SHOULDER | −0.071 | 0.014 | −0.057 | 0.016 | 0.023 | 0.011 | −0.017 | 0.010 |
| MEDIAN |
|
| −0.028 | 0.010 |
|
|
|
|
| AADT | 1.27E−06 | 4.85E−07 | 1.13E−06 | 4.86E−07 |
|
| −6.50E−07 | 3.50E−07 |
| RADIUS | −4,47E−05 | 1.73E−05 | −4.26E−05 | 1.75E−05 |
|
| −2.16E−05 | 1.05E−05 |
| R2 | 0.508 |
| 0.453 |
| 0.158 |
| 0.208 |
|
| Adjust R2 | 0.454 |
| 0.380 |
| 0.061 |
| 0.087 |
|