| Length | Answer | % Correct |
|---|---|---|
| 4992km/3102 miles | I-90 | 81%
|
| 4665km/2,899 miles | I-80 | 75%
|
| 4111km/2,555 miles | I-40 | 50%
|
| 5161km/3207 miles | Route 6 | 31%
|
| 4152km/2,580 miles | Route 2 | 19%
|
| 5209km/3237 miles | Route 20 | 13%
|
| 3996km/2,483 miles | Route 12 | 6%
|
| 4945km/3073 miles | Route 30 | 6%
|
| 4845km/3,011 miles | Route 50 | 6%
|
| 4296km/2,670 miles) | Route 60 | 6%
|