One of the most important things you can do to prove negligence is to document - photos, video, descriptions, time, names, etc. are all. Additionally, it is important to talk to witnesses in order to obtain more evidence.

No Zones are essentially “blind spots” located beside or behind commercial trucks, where visibility is non existent to the truck driver. These can be incredibly dangerous, as the truck driver may make driving decisions with the assumption that it is clear.
Yes, you may sue a truck driver's company for your injuries in the event that the driver is responsible for the accident. Trucking companies typically have resources such as insurance companies and lawyers protecting their best interests in personal injury cases. That being said, each case is different and weather you are dealing with a company or individual, it is important to consult an attorney.