Hey, thanks for your contributions. However a few things to note:

1. A sensible changeset description is preferable to just ".". This mainly helps others to figure out what you did. 

2. noexit=yes is not used to mark dead-end streets.  In many cases they are not marked at all in OSM. noexit=yes is used on the last node of a way to indicate that there absolutely is no way to go further from there (for any mode of transport – and that's where it typically deviates from a dead-end because often you can at least continue by foot, e.g. towards a house. In this case this is even literally the case, as there is a footway continuing, barred to motor vehicle traffic with a bollard.

3. Before adding traffic signs directly, please add the respective meaning on the road (in this case maxspeed=30 + source:maxspeed=DE:zone30) as that is what data consumers use. Traffic signs itself are more a micromapping thing for 3D renderers, so should be a bit further down in priority.