Traffic Detector Locations & Vehicle Counts

Source

Transport Department (TD)

Department URL: https://www.td.gov.hk/en/transport_in_hong_kong/traffic_information/
Detector Info CSV: https://static.data.gov.hk/td/traffic-atc-veh-class/info/traffic_prop_vehicle_class_info.csv
CKAN Dataset: https://data.gov.hk/en-data/dataset/hk-td-tis_traffic-atc-veh-class

Format

CSV Detector info is static. Count data updates periodically. No API key.

~300

Detector Locations

Hourly

Count Frequency

8 Classes

Vehicle Types

Schema / Fields

Detector Info (static CSV)

Field	Type	Example	Description
`DETECTOR_ID`	string	`"A1801"`	Unique detector identifier
`ROAD_NAME`	string	`"DES VOEUX ROAD CENTRAL"`	Road where detector is installed
`DIRECTION`	string	`"EASTBOUND"`	Traffic direction monitored
`EASTING`	float	`833241.3`	HK Grid easting coordinate
`NORTHING`	float	`816847.2`	HK Grid northing coordinate
`DISTRICT`	string	`"Central & Western"`	Administrative district

Count Data (periodic CSV)

Field	Type	Example	Description
`DETECTOR_ID`	string	`"A1801"`	Detector reference
`DATE`	date	`2024-01-15`	Count date
`HOUR`	integer	`12`	Hour (0-23)
`CLASS_1`	integer	`1842`	Motorcycles
`CLASS_2`	integer	`3241`	Private cars
`CLASS_3`	integer	`420`	Taxis
`CLASS_4`	integer	`312`	Light goods vehicles
`CLASS_5`	integer	`84`	Medium goods vehicles
`CLASS_6`	integer	`21`	Heavy goods vehicles
`CLASS_7`	integer	`156`	Buses
`CLASS_8`	integer	`38`	Special purpose vehicles
`TOTAL`	integer	`6114`	Total vehicle count

Example API Call

# Download detector info
curl -o detector_info.csv \
  "https://static.data.gov.hk/td/traffic-atc-veh-class/info/traffic_prop_vehicle_class_info.csv"

# CKAN for count data files
curl "https://data.gov.hk/en-data/api/3/action/package_show?id=hk-td-tis_traffic-atc-veh-class"

Example Response

DETECTOR_ID,ROAD_NAME,DIRECTION,EASTING,NORTHING,DISTRICT
A1801,DES VOEUX ROAD CENTRAL,EASTBOUND,833241.3,816847.2,Central & Western
A1802,QUEEN'S ROAD CENTRAL,WESTBOUND,833189.7,816742.1,Central & Western
A1803,CONNAUGHT ROAD CENTRAL,EASTBOUND,833312.4,816981.5,Central & Western

Used By

Model	How
ABM Theory	Vehicle flow as proxy for street-level foot traffic intensity
Site Rating	Traffic volume sub-score: high volume = high visibility, but also noise/pollution penalty

Notes / Gotchas

Vehicle counts are proxies for pedestrian flow, not direct measurements — correlation is positive but noisy
Des Voeux Road and Connaught Road (tram routes) have different traffic characters from Queen’s Road
Detectors cover arterial roads; side streets (like Wa In Fong East) have no detectors
High vehicle counts on Connaught Road (expressway) do not translate to pedestrian flow — filter by road type