# description
A real-time prediction of a vehicle's arrival or departure time at a stop, including an indication of prediction confidence.

# properties.certainty.description
Confidence of the prognosis (e.g. real, prognosis, calculated, unknown)

# properties.delaySeconds.description
Delay in seconds relative to the scheduled time

# properties.id.description
Unique identifier for the tracking record

# properties.url.description
URL endpoint for real-time tracking information

# properties.validity.description
Validity period for this tracking record