What is the relationship between politics, people, place, and the infrastructural system?
Who ushered the system into existence? Who benefits from it? Is there a power imbalance somewhere in the process of development and use? Does that power imbalance ever shift?
Does the system interact with ideas of nature, progress, the city, or the state? If not, what other kinds of ideologies are wrapped up in it?
If you are choosing an angle that involves questions of justice, what might justice look like around that system?
