So, I've gotten into a heated debate about whether or not driving without Gridguide makes you a menace to everyone driving with Gridguide. We agreed to take it to a different thread aaaaand here we are.
Let's start with a description of Skyguide:
By linking with SkyGuide, a drone can use the network’s own guidance systems to get where it needs to be. The downside is that the system takes priority over the owner’s commands, allowing the drone to be controlled by the Guide, or Riggers employed by SkyGuide, against the owner’s wishes. The upside is that SkyGuide provides both a Navigation (6) autosoft and a Maneuver (6) autosoft to any drone while it’s logged in to the network.
Based on that description, we can think of the Skyguide host as an RCC with control over every drone linked to it. Can we also think of the Gridguide host (and long as we're discussing the matter, the Harborguide host) as an RCC? Common sense says yes, but just to be sure I read the original description of Gridguide given in Rigger 3. Everything checks out: the Gridguide of the 2060s takes data in and puts instructions out, self-driving autonavs follow those instructions and collisions are averted by a vehicle's sensors and autonav. This closely matches the behavior of an RCC issuing commands to drones or vehicles.
With that in mind, I can answer some important questions:
How does Gridguide work?Smartass answer: like an RCC. Real answer: Gridguide takes data from various sources and based on that data gives instructions to the vehicles it controls. The vehicles follow these instructions, and that's how you go from point A to point B.
What kind of data does Gridguide use and where does it get it from?Gridguide hasn't been described in detail since Rigger 3, so it's not quite clear if all the old traffic cams, directional radar stations and whatnot are still up. However, I can tell you that it knows the identity, location, speed, and direction of all vehicles it controls. If asked for directions (which is almost always the case), it knows the route and destination of the vehicles as well. This data is used to manage traffic, get everyone where they want to go in good time and meter any paid parking you do. To gather information on road hazards, Gridguide relies on traffic cams, weather updates, sensor data from the vehicles it controls and probably some other things I can't think of off the top of my head.
How does Gridguide manage traffic?Every street in a metroplex has a maximum traffic rating, which is the maximum number of vehicles that can be on it at any given time. Gridguide determines the route of every vehicle it controls on the basis of keeping every street below its maximum traffic rating. During emergencies, Gridguide will divert traffic away from the emergency and out of the path of first responders while changing traffic lights to accommodate the first responders. Additionally, Gridguide will divert traffic away from any vehicle pursuits.
How does Gridguide enforce traffic laws?Illegal driving actions are impossible to commit while following Gridguide's instructions, and Gridguide takes precedent over all other inputs (except for rigging, as Gridguide is a form of remote control).
How does Gridguide prevent crashes?Vehicles controlled by Gridguide cannot crash into each other or any known obstacles because it is impossible to do so while following Gridguide's instructions, barring a mechanical malfunction or certain unavoidable road hazards such as ice. In those cases, or in the case of a sudden, unforeseen obstacle or road hazard, either the Driver must make a Reflex+Pilot Groundcraft check or the vehicle must make a Pilot+Maneuvering check. Gridguide does provide a Maneuvering autosoft, with rating depending on your level of service. To learn your level of service, bug Wakshaani about it.
Is it important to having functional sensors while using Gridguide?Yes. Not only does Gridguide use data from your sensors, but you need them to detect any sudden, unforeseen obstacles and road hazards.
Does Grideguide allow all vehicles it controls to see each other over the Matrix?No. Pilots cannot see Matrix Icons. Where did you get that idea?
Are vehicles without Gridguide dangerous to Gridguide users?Not as a rule. Unless concealed in some way, Gridguide would be aware of any vehicles on the road that it doesn't control and could compensate for them like any other known obstacle. A detectable off-grid vehicle would only be dangerous if driven incompetently and/or recklessly.