In this post we describe what each of the objects are so that you will have an easier time confirming or rejecting the detection in each image.
Banner: Typically a flag, made of textile or plastic.
Catch basin: Sewage water drainage, typically with a grid on top or inlet of a curb.
Junction box: An electrical junction box can contain junctions of electric wires and/or cables.
Bird: Includes birds on the ground.
Ground animal: Animals which move on the ground.
Crosswalk -plain: Region of a road which is meant to cross the street but not marked with a zebra pattern, instead two parallel lines indicate the crosswalk. The road surface is marked as plain crosswalk, the two lines indicating the border are marked as general markings.
Marking: crosswalk zebra: Crosswalk indicated by a zebra pattern.
Bench: A long seat for several people, typically made of wood or stone (Oxford).
Bike rack: A parking space for bicycles with space for the bicycle owner to attach a lock.
CCTV basin: Surveillance camera mounted in public space.
Fire hydrant: A fitting in a street or other public place with a nozzle by which a fire hose may be attached to a water main (Oxford).
Mailbox: A receptacle for sending or receiving mail. These can be residential or public.
Manhole: Covered opening in a paved area to access underground space or system. Must be big enough to fit a person, may be square or round.
Parking meter: A machine next to a parking space in a street, into which the driver puts money so as to be authorized to park the vehicle for a particular length of time (Oxford).
Phone booth: A public call box typically equipped with a payphone.
Streetlight: A light illuminating a road, typically mounted on a tall post (Oxford).
Pole: (support) Thin and elongated, typically vertically oriented poles, e.g. sign or traffic light poles. Does not include objects mounted on the pole. Poles holding only street lights should also be labeled as pole.
Traffic sign frame: Frame construction holding large signs, where frame can be made of round or square poles. Can be typically found on highways.
Utility pole: Utility poles are supposed to carry electrical wires/cables, could be used to mount mobile phone network receivers, and are used in case both, cables and street lights are mounted
Object: traffic light: Traffic lights without poles in different orientations (upright, horizontal, side, back, front) and for all types of traffic participants, e.g. regular traffic light, bus traffic light, train traffic light. If the type can be determined but does not match any of the defined categories
(e.g. traffic lights for trains), then traffic light - other is used. If the orientation or type of traffic light cannot be determined, traffic light - ambiguous is used.
Traffic sign (back): Back side of traffic signs.
Traffic sign (front): Signs with the purpose of conveying information to drivers/cyclists/pedestrians, e.g. traffic signs or warning reflector posts. If the type of a frontviewed traffic sign cannot be determined, e.g. because of unknown language, trafficsign - unknown is used as fallback.
Trash can: A vessel to distribute personal or public waste.
Bicycle: Includes bicycles without the cyclist or possibly other passengers. The cyclist and passengers receive label cyclist.
Boat: Vehicle suitable for riding/sailing on water.
Bus: Includes buses that are intended for 9+ persons for public or long distance transport.
Car: This includes cars, jeeps, SUVs, vans with a continuous body shape (i.e. the driver cabin and cargo compartment are one).
Caravan: Vehicles that (appear to) contain living quarters. This also includes trailers that are used for living and has priority over the trailer class.
Motorcycle: This includes motorcycles, mopeds without the driver or other passengers. Both driver and passengers receive the label motorcyclist.
Vehicle on rails: All vehicles moving on rails, e.g. trams, trains.
Other vehicles: Fallback category for vehicles not explicitly defined otherwise in meta category level vehicle.
Trailer: Trailers that can be attached to any vehicle, but excludes trailers attached to trucks. The latter belong to class truck.
Truck: This includes trucks, vans with a body that is separate from the driver cabin, pickup trucks, as well as their attached trailers.
Wheeled slow vehicle: Covers all slow moving wheeled objects like wheelchairs, mobilityscooters, scooters, prams or rickshaw. All of which can potentially have riders (other rider) sitting on them, similar to cycles are driven by cyclists.