StopReliability

Point-Reliability is a feature where one puts a pin on the map and the reliability of the selected route during the selected time-interval appears in the bottom pane.

• the coordinates of the pin will be passed in as an optional argument to the existing GraphQL endpoint.
• if provided, a PointReliability object will be returned at the top level.

StopReliability {
   lat: Float
   lon: Float
   sid: String
   arrivals: [Arrival]
}

Arrival {
    rid: String
    did: String
    arrival: Date
    departure: Date
    dwell: Int
    lat: Float
    lon: Float
}

Orion

• No changes

Tryn-API

• Given the pin, get all arrival/departures/pass-throughs for vehicles on each route travelling through that point.

• In each state, each vehicle's distance to/from

• Given the pin, go through the locations and for each one within the radius (50 metres), make it into an arrival.

• For each vehicle ID, if its distance is closer to point, we take the closest and earliest time to the point, which gets us the arrival.

• For departures, we take the closest and latest time to the point. We make the assumption that a vehicle's location won't change during dwelling

• may not be true at near-side stops, where at peak-hours operators often drop off customers before the stop due to cars ahead waiting to turn right. Cases:

• Vehicles skipping a stop. Arrival/Departure times would be almost the same, so dwell time would be zero.
• Vehicles stopped at near-side stop intersection but doors never open. Since door status isn't part of the Nextbus feed, we can't distinguish in this case.
• Vehicle travelling in the opposite direction during the time interval while staying in the area. We take vehicles by (vehicle ID, direction ID) pairs, so there'd be two arrivals/departures.
• Vehicle passes through area without having any timepoints within. We process all vehicles, so if a vehicle

Tryn-React

• Gets the arrivals - select one or more patterns (ie. select individual directions and branches, while also analyzing trunk sections)
• Add ability to choose a time interval and drop a pin.
• Add bottom pane where arrivals are shown.