/api/v1/data-gov-hk/traffic/speed.{
"date_hkt": "string",
"time_hkt": "string",
"irn_version": "string",
"segment_count": 0,
"valid_segment_count": 0,
"average_speed_kph": 0,
"segments": [
{
"segment_id": "string",
"speed_kph": 0,
"valid": "string"
}
]
}