| Plainfield - Means of Transportation to Work | FIPS Code=23070 |
| 1970 | 1980 | 1990 | |
| Per Cent of Working Population that Drove Alone to Work | 49.73 | 50.16 | 66.40 |
| Per Cent of Working Population that Carpooled to Work | 17.93 | 35.47 | 14.63 |
| Per Cent of Working Population that Used Public Transportation | 0.00 | 0.00 | 0.00 |
| Per Cent of Working Population that Walked to Work | 11.96 | 10.85 | 5.79 |
| Per Cent of Working Population that Used Other Means to Get to Work | 2.45 | 3.49 | 0.96 |
| Per Cent of Working Population that Worked at Home | 17.93 | 7.17 | 12.22 |