TMC Event code 897 says "People throwing objects onto the road. Danger". In DATEX II, the best match is "attackOnVehicle" (a DisturbanceActivity), which is semantically not the same (you can think of throwing stones without attacking a vehicle as well as an attack on a vehicle without throwing stones).
Proposal is to add a literal like "throwingObjects" to DisturbanceActivity.
Effects Part 3.
I took it into EN review.
Does not seem to appear in the part 3 comments I received, has not been implemented.
Fixed in comment resolution for Enquiry, in revision 794