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Mobility Data Specification: Car Share

MDS Modes - Car Share

Car Share refers to shared point-to-point and station-based mutli-passenger vehicles. Car Share typically has a driver who is the customer, and possibly one or more passengers or cargo.

See the modes overview for how the mode specific information below applies across MDS.

Table of Contents

Mode Attributes

Mode ID

The short name identifier for Car Share used across MDS is car-share.

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Trip Properties

See more available trip and fare attributes for any mode used in the trips object.

Journey ID

The journey_id field shall have a consistent value in overlapping trips for a single reservation period, e.g. trips taken by a customer between ignition states over the duration of their reservation. A reservation is the duration the customer has continuous exclusive access to the vehicle whether parked or in motion. Journeys may be point-to-point or multi-segment.

  • Example 1: customer makes a reservation and company delivers vehicle to customer, then one trip point-to-point by customer, ending reservation at destination
  • Example 2: customer reservation for multiple days with trips for errands, gas, entertainment, etc
  • Example 3: one trip point-to-point with an employee moving the vehicle to a new location for maintenance

Journey Diagram

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Journey Attributes

The journey_attributes object may have the following key value pairs:

  • reservation_id (UUID, optional): unique identifier for an entire car share reservation, tied across multiple journeys and therefore trips.

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Trip ID Requirements

Events require a valid trip_id in events where event_types contains reservation_start, reservation_stop, trip_start, trip_resume, trip_end,trip_cancel, customer_cancellation, provider_cancellation, or driver_cancellation.

Additionally, trip_id is required if event_types contains a trip_enter_jurisdiction or trip_leave_jurisdiction event pertaining to a trip.

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Trip Type

The trip_type field must have one of the following enumerated values:

  • private: a private trip made by one paying customer with one or more guests
  • reservation: en route to pickup a customer who has made a reservation, with no passengers in the vehicle
  • empty: vehicle movement with no customer (outside of other trip_type values) that may need to be reported, e.g. for maintenance

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Trip Attributes

The trip_attributes object may have the following key value pairs:

  • reservation_type (enumerated, required): how was the vehicle reserved, one of phone_dispatch, phone, text, app
  • app_name (text, optional): name of the app used to reserve the vehicle which could be provider's app or 3rd party app
  • permit_license_number (string, optional) - The permit license number of the organization that dispatched the vehicle
  • driver_id (string, optional): Universal identifier of a specific driver, static across operators, like a driver's license number, for company employees in reservation or empty trip types, not private trips. Could also be used as a lookup in an agency's internal driver system.

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Fare Attributes

The fare_attributes object may have the following key value pairs:

  • payment_type (enumerated, required): account_number, cash, credit_card, mobile_app, no payment, phone, voucher, test
  • fare_type (enumerated, required): meter_fare, upfront_pricing, flat_rate. Indicator of which rate was charged.
  • tolls (currency, optional) - Sum of any and all tolls charged for the trip, such as bridge tolls
  • base_rate (currency, optional) - Minimum fare to be charged as soon as the trip starts.
  • exit_fee (currency, optional) - Fee to exit location, like an airport
  • other_fees (currency, optional) - amount of any fees charged to the customer. Includes baggage fees, cleaning fee. Excludes other fees returned.
  • tip (currency, optional) - amount of tip paid by customer
  • extra_amount (currency, optional) - miscellaneous extra amounts charged to customer not covered by other fields.
  • taxes (currency, optional) - amount of taxes paid for the ride
  • surcharge (currency, optional) - any surcharge pricing

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Vehicle Properties

See more available vehicle attributes and accessibility options for any mode used in the vehicles object.

Vehicle Attributes

The vehicle_attributes object may have the following key value pairs:

  • year (integer, required)
  • make (string, required)
  • model (string, required)
  • color (string, required)
  • vin (string, required) - the Vehicle Identification Number of the vehicle
  • license_plate (string, required) - the registered external license plate number of the vehicle
  • inspection_date (date YYYY-MM-DD, optional) - the date of the last inspection of the vehicle
  • snow_shovel (boolean, optional) - shovel for removing snow or ice from around vehicle or vehicle path
  • snow_brush (boolean, optional) - brushes for removing snow or ice from vehicle
  • bike_rack (boolean, optional) - car roof or trunk mounted bike rack
  • park_access (boolean, optional) - access pass to a national/regional/municipal park system
  • toll_transponder (boolean, optional) - toll transponder for national/regional toll system
  • phone_charger (boolean, optional) - a place to charge your phone
  • sunshade (boolean, optional) - sunshade available (i.e. for windshield)
  • cargo_volume_capacity (integer, optional) - Cargo volume available in the vehicle, expressed in liters. For cars, it corresponds to the space between the boot floor, including the storage under the hatch, to the rear shelf in the trunk.
  • cargo_load_capacity (integer, optional) - The capacity of the vehicle cargo space (excluding passengers), expressed in kilograms.
  • door_count (integer, optional) - number of doors this vehicle type has
  • wheel_count (integer, optional) - number of wheels this vehicle type has
  • air_conditioning (boolean, optional) - vehicle has air conditioning
  • gear_switch (enum, optional) - one of automatic, manual
  • convertible (boolean, optional) - vehicle has a retractable roof
  • cruise_control (boolean, optional) - vehicle has a cruise control system
  • navigation (boolean, optional) - vehicle has a built-in navigation system

Note many of these attributes come from fields in GBFS vehicle_types.

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Accessibility Attributes

This accessibility_attributes enum represents the accessibility attributes available on a given vehicle, or the accessibility attributes utilized for a given trip.

accessibility_attributes Description
wheelchair_accessible This vehicle is wheelchair accessible

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State Machine

Vehicle States

Valid car share vehicle states are

  • removed
  • available
  • non_operational
  • reserved
  • on_trip
  • stopped
  • non_contactable
  • elsewhere

See Vehicle States for descriptions.

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Event Types

Valid car share vehicle event types are

  • charging_start
  • charging_end
  • comms_lost
  • comms_restored
  • customer_cancellation
  • driver_cancellation
  • fueling_start
  • fueling_end
  • maintenance
  • maintenance_pick_up
  • maintenance_end
  • provider_cancellation
  • remote_start
  • remote_end
  • reservation_stop
  • reservation_start
  • service_end
  • service_start
  • trip_end
  • trip_enter_jurisdiction
  • trip_leave_jurisdiction
  • trip_resume
  • trip_start
  • trip_stop

See vehicle Event Types for descriptions.

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Vehicle States Events

This is the list of vehicle_state and event_type pairings that constitute the valid transitions of the vehicle state machine.

From vehicle_state To vehicle_state trip_state event_type Description
available elsewhere N/A trip_leave_jurisdiction The vehicle has left jurisdictional boundaries while available for-hire
available non_contactable N/A comms_lost The vehicle has went out of comms while available for-use
available non_operational N/A service_end The vehicle has went out of service (is unavailable for-hire)
available reserved reserved reservation_start The vehicle was reserved by a passenger
elsewhere available N/A trip_enter_jurisdiction The vehicle has entered jurisdictional boundaries while available for-hire
elsewhere non_contactable N/A comms_lost The vehicle has went out of comms while outside of jurisdictional boundaries
elsewhere non_operational N/A trip_enter_jurisdiction The vehicle has entered jurisdictional boundaries while not operating commercially
elsewhere on_trip on_trip trip_enter_jurisdiction The vehicle has entered jurisdictional boundaries while on a trip
elsewhere reserved N/A trip_enter_jurisdiction The vehicle has entered jurisdictional boundaries while reserved by a customer
non_contactable available N/A comms_restored The vehicle has come back into comms while available for-hire
non_contactable elsewhere N/A comms_restored The vehicle has come back into comms while outside of jurisdictional boundaries
non_contactable non_operational N/A comms_restored The vehicle has come back into comms while not operating commercially
non_contactable on_trip on_trip comms_restored The vehicle has come back into comms while on a trip
non_contactable removed N/A comms_restored The vehicle has come back into comms while removed
non_contactable reserved reserved comms_restored The vehicle has come back into comms while reserved by a passenger
non_contactable stopped stopped comms_restored The vehicle has come back into comms while stopped
non_operational available N/A service_start The vehicle has went into service (is available for-hire)
non_operational elsewhere N/A trip_leave_jurisdiction The vehicle has left jurisdictional boundaries while not operating commercially
non_operational non_contactable N/A comms_lost The vehicle has went out of comms while not operating commercially
non_operational removed N/A decommissioned The vehicle has been removed from the Provider's fleet
non_operational removed N/A maintenance_pick_up The vehicle has entered the depot for maintenance
non_operational removed N/A maintenance The vehicle is undergoing maintenance on site
on_trip elsewhere N/A trip_leave_jurisdiction The vehicle has left jurisdictional boundaries while on a trip
on_trip non_contactable N/A comms_lost The vehicle has gone out of comms while on a trip
on_trip stopped stopped trip_stop The vehicle has stopped while on a trip
removed non_contactable N/A comms_lost The vehicle has gone out of comms while removed
removed non_operational N/A maintenance_end The vehicle maintenance work has ended
removed non_operational N/A recommissioned The vehicle has been re-added to the Provider's fleet after being previously decommissioned
reserved available N/A driver_cancellation The driver has canceled the reservation
reserved available N/A customer_cancellation The customer has canceled the reservation
reserved available N/A provider_cancellation The provider has canceled the reservation
reserved elsewhere N/A trip_leave_jurisdiction The vehicle has left the jurisdiction while in a reservation
reserved non_contactable N/A comms_lost The vehicle went out of comms while being reserved by a passenger
reserved stopped stopped reservation_stop The customer has activated the vehicle
stopped available N/A driver_cancellation The driver has canceled the trip
stopped available N/A customer_cancellation The customer has canceled the trip
stopped available N/A provider_cancellation The provider has canceled the trip
stopped available N/A trip_end The trip has been successfully completed
stopped non_contactable N/A comms_lost The vehicle has went out of comms while stopped
stopped on_trip on_trip trip_resume Resume a trip that was previously stopped (e.g. picking up a friend to go to the airport with)
stopped on_trip on_trip trip_start Start a trip
stopped stopped stopped charging_end End charging the device battery
stopped stopped stopped charging_start Start charging the device battery
stopped stopped stopped fueling_end End fueling the device with physical fuel
stopped stopped stopped fueling_start Start fueling the device with physical fuel
stopped stopped stopped remote_end Remotely stop the engine while vehicle is already stopped
stopped stopped stopped remote_start Remotely start the engine while vehicle is stopped, usually to charge battery or warm up

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State Machine Diagram

This State Machine Diagram shows how vehicle_state and event_type relate to each other and how vehicles can transition between states. See Google Slides for the source file.

Car Share State Machine Diagram

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