I have created a roundabout and built corridors using the approach edge alignments. How do i tie these in to the corridors of my main alignments? I have attached images of the roundabout I have built so far and the approach and exit assemblies I have been using.
Any help/advice on building roundabouts would be gratefully received.
Did you use the "Create Roundabout" tool? Or did you create a corridor for the roundabout?
Don Ireland
Engineering Design Technician
You are going to need a bunch more assemblies to model it, use the large pieces you have currently and then build the other assemblies to model the holes.
I make corridor with multiple baselines and regions. Typically, one baseline is the ronudabout istself (radius - i prefer inner, small radii); others are edges of approaches.
Work from the outside in with roundabouts.
You will need alignments as follows. Depends on your design standards of course these are for Brits but is stil a good method.
Roundabout crown line at 1/3 2/3rds.
Edge alignments following the entrances & exits created from entry to exit lanes for each junction.
centrelines for all junctions
See other post for more detailed description on modelling.
Stockdale method; http://www.docstoc.com/docs/120766470/Roundabout-Design---Part-1.
Mike