Known Issues: StreetLight InSight® Planning API

These issues affect Truck analyses with Network Performance for data months in 2026 as of the 2604 release. We are working on resolving these issues in the upcoming release.

For 2026 data months in Network Performance with the Truck travel mode, in the day_types parameter, you must define weekdays as Monday - Friday Weekday|15, while for other data months, you must define weekdays as Monday - Thursday Weekday|14.

No data returned for 2026 with Mon - Thu weekdays

Network Performance analyses using Truck mode and 2026 date ranges will return empty results if a Monday - Thursday weekday definition is used. This occurs with the following parameter settings:

• analysis_type = "Network_Performance"
• travel_mode_type = "Truck"
• date_ranges include 2026
• day_types include Weekday|14

Workaround

For Network Performance Truck analyses with 2026 date ranges, specify day_types = "Weekday|15 instead of the default day_types = "Weekday|14.

Mixing 2026 with earlier years in date_ranges

The API allows combining 2026 with earlier years in a single request, but results may be inconsistent due to different weekday definitions, and the issue described above.

Workaround

• Use day_types = "Weekday|15" for 2026 analyses
• Run separate requests for 2026 vs. earlier years
• Use caution when comparing results across years due to differing weekday definitions