| Groton - Means of Transportation to Work | FIPS Code=5020 |
| 1970 | 1980 | 1990 | |
| Per Cent of Working Population that Drove Alone to Work | 60.87 | 47.15 | 76.74 |
| Per Cent of Working Population that Carpooled to Work | 16.43 | 34.81 | 13.66 |
| Per Cent of Working Population that Used Public Transportation | 0 | 0.95 | 0 |
| Per Cent of Working Population that Walked to Work | 8.21 | 10.13 | 6.1 |
| Per Cent of Working Population that Used Other Means to Get to Work | 0 | 0 | 0 |
| Per Cent of Working Population that Worked at Home | 14.49 | 6.96 | 3.49 |