TrackDesigner for Mac

From scideas software:

TrackDesigner allows you to test out designs from the comfort of your Mac rather than spending hours on your hands and knees, breaking the track connectors as you strive for the ultimate layout. Main Features

• simple, intuitive interface suitable for children
• use sport and classic sections together
• colour coded lanes with a simple graphic to indicate relative lengths
• traphic lights indicate how well your layout joins up
• scaled layout view
• reverse angle of curves and direction of side swipes
• remove sections
• rotate and centre layout
• add bridges (shortening sections appropriately)
• metrics drawer for actual and scaled up dimensions
• save/load layouts
• quick help and detailed HTML help file

NB TrackDesigner is geometrically accurate. Using it you will see that layouts completing exactly when flat do not quite meet when the effect of raising bridges is correctly calculated.