Directions - "totalLength" units of measure?

Question

Hi all,

Does anyone know where the units-of-measure of the "totalLength" is specified?
This seems to be in meters even though my layer says it in Miles ("directionsLengthUnits": "esriNAUMiles").

json["directions"];
{[
 {
 "routeId": 1,
 "routeName": "Location 1 - Location 2",
 "hasM": true,
 "summary": {
 "totalLength": 5221.98296067188,
 "totalTime": 4.41884235246107,
 "totalDriveTime": 4.4188423535129635,
 "envelope": {
 "xmin": -87.652578690999917,
 "ymin": 41.878818755651714,
 "xmax": -87.6294279999999,
 "ymax": 41.903987605323444,
 "spatialReference": {
 "wkid": 4326,
 "latestWkid": 4326
 }
 }
 },

Sa_EdA_Rafat · Answer

Sorry, I don't understand your response! 
I think I'm in the wrong forum... I'll repost this for Server.

DanPatterson_Retired · Answer

Firstly, if you are using the Network Analyst, you should be using projected data and not relying on projections-on-the-fly

Sa_EdA_Rafat · Answer

Are you sure that NA does the conversion for you?  I think the units are in the units of the coordinate system, ergo, if the projection has metric units, then it should be in meters

I measured the distance - the value is in meters. 
My data is in WGS84, is meters the default unit of measure (not decimal degrees)?