Collapse dual lines to centreline not working...

[MeganBuckland]

Hello,

As the title suggests I am trying to collapse my road outlines to a centreline. Some roads are 15m and some are 90m, up to 130m at wide junctions. When i use the generalisation tool "collapse dual lines to centreline" this happens:

I have attached the attribute table just in case that helps.

This is my first solo GIS project so I apologise if I am missing something obvious. Thank you in advance for your help.

[MeganBuckland]

I have just realised that my roads are segmented like this, which is probably why the lines are forming inside instead of between roads. Does anyone know how to fix this? 

 

[DanPatterson]

Collapse Dual Lines To Centerline (Cartography)—ArcMap | Documentation (arcgis.com)

Could be...

The tool is not intended to simplify multiple-lane highways with interchanges, ramps, overpasses and underpasses, or railways with multiple, merging tracks. Use the Merge Divided Roads tool instead.