21. Kentucky
> Effective gas tax: 26.0 cents
> Gas price: $1.66 (12th lowest)
> Number of petroleum refineries: 2 (tied-17th highest)
> Number of licensed drivers: 3,019,283 (25th lowest)
> Annual vehicle miles travelled per capita: 10,692 (15th highest)
22. Massachusetts
> Effective gas tax: 26.5 cents
> Gas price: $1.88 (15th highest)
> Number of petroleum refineries: 0 (tied-20th lowest)
> Number of licensed drivers: 4,765,586 (15th highest)
> Annual vehicle miles travelled per capita: 8,414 (9th lowest)
23. Montana
> Effective gas tax: 27.7 cents
> Gas price: $1.83 (20th highest)
> Number of petroleum refineries: 4 (tied-9th highest)
> Number of licensed drivers: 766,716 (8th lowest)
> Annual vehicle miles travelled per capita: 11,853 (8th highest)
24. Nebraska
> Effective gas tax: 27.7 cents
> Gas price: $1.78 (25th highest)
> Number of petroleum refineries: 0 (tied-20th lowest)
> Number of licensed drivers: 1,374,529 (14th lowest)
> Annual vehicle miles travelled per capita: 10,341 (22nd highest)
24/7 Wall St.
25. Ohio
> Effective gas tax: 28.0 cents
> Gas price: $1.69 (16th lowest)
> Number of petroleum refineries: 4 (tied-9th highest)
> Number of licensed drivers: 8,030,421 (7th highest)
> Annual vehicle miles travelled per capita: 9,746 (20th lowest)