Road surface condition codes

Road surface condition codes are available via the Weather API by including road_surface_condition as a requested variable. This variable is reported by Road Weather Information System (RWIS) stations, commonly part of state Department of Transportation (DOT) networks.

An API response including this variable might look like:

JSON

"road_surface_condition_value_1": 
  {
    "date_time": "2020-01-06T22:36:00Z",
    "value": 9
  }

The following table provides descriptions for each code value.

Road Surface Condition Code Values

Note that some descriptions are repeated, due to the history of different road sensor types outputting different numeric codes.

Code	Description
0	No Report
1	Dry
2	Trace Moisture
3	Moist
4	Wet
5	Chemically Wet
6	Ice
7	Frost
8	Snow
9	Slush
11	Dry
12	Trace Moisture
13	Wet
14	Chemically Wet
15	Ice Watch
16	Ice Warning
17	Frost
18	Snow Watch
19	Snow Warning
21	Snow/Ice Watch
22	Snow/Ice Warning
23	Wet Below
24	Damp
25	Absorption
26	Error
27	No Report