Transportation is terribly important to the economy. If we could not easily and efficiently move goods around the country, things would get expensive, if not impossible to acquire. Entrepreneurs would have quite a chore assembling all the things they needed for business if it weren't for our roads and airports and internets bringing everything right to his door.
The government quite helpfully steps in and maintains and improves things like roads and airports - so that we don't have to.
Recently the FAA ceased to have authority to keep operating - that meant no improvements to airports. Now it appears that the highway fund is in danger. Some politicians want to end the gas tax (how we pay for roads) which would mean no money for road construction. Really? The expense and trouble caused by a declining infrastructure would be detrimental to our economy. Just think about it.