usdot-jpo-ode#159 Additional vehicle_impact to enable real time field…

… data

spec-content/enumerated-types/VehicleImpact.md

@@ -9,7 +9,13 @@ Value | Description
 `all-lanes-open` | All lanes are open
 `alternating-one-way` | The roadway is alternating one way
 `unknown` | The vehicle impact is unknown
-
+`some-lanes-closed-merge-left` | Some lanes merge to the left
+`some-lanes-closed-merge-right` | Some lanes merge to the right
+`all-lanes-open-shift-left` | All lanes are open, shift to the left
+`all-lanes-open-shift-right` | All lanes are open, shift to the right
+`some-lanes-closed-split` | Some lanes end and split & merge to the right and left
+`flagging` | A flagging operation is in effect
+`temporary-traffic-signal` | A temporary traffic signal
 ## Used By
 Property | Object
 --- | ---