@Wayne If you would not raise gas taxes to pay for roads and transportation projects, how would you pay for roads and transportation projects? They have to be paid somehow. My state uses toll booths to pay for some major roads, which keeps our gas taxes about 3 cents per gallon lower than they would be without the tolls. However the cost of collecting tolls makes it a far more inefficient way of raising transportation funds than a gas tax. It makes no sense from an efficiency point of view.
Based on your answer, I assume you did not read my Hub on this topic, as I lay out the case regarding why raising the gas tax can be fiscally conservative, when it save money versus borrowing and paying bonding fees and interest.