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Contributor/author(s): Douwe

Let's face it, SimCity 3000's default highway interchanges are not only unrealistic, they aren't even remotely functional. How you create functional, realistic interchanges is the subject of many articles in the Knowledge Neighborhood. Let's have a quick look at 3 of them for reference. Full details of constructing them are in the relevant articles.

Pictured here are (1) the Dog-Earred, (2) the T-Interchange with Auxiliary Roads and (3) the Crossover with Auxiliary Roads. The Dog-Eared doesn't look imposing but functions well. As the marked up version below demonstrates traffic may flow in any direction without stops.

The Interchanges with Auxiliary Roads both suffer from the problem of having intersections stopping traffic at the base of each ramp. Otherwise they are fully functional.

Presented below are my attempts to solve these problems and to give greater variety to the Interchanges available to my SimEngineers. I will present them here without much comment as they are self explanatory for the most part. Note that I have avoided intersections.

T Interchanges

T-Interchange - two views. Unfortunately, through traffic is impeded by the two ugly blocks. Below a couple of solutions to this difficulty.

Crossover Interchanges

Pinwheel Interchange

Full Cloverleaf

Compressed Cloverleaf and Collapsed Cloverleaf

If like me, you enjoy creating realistic looking cities with a truly functional system of expressways, you'll no doubt find uses I haven't thought of for these interchanges and techniques.

See also
Highway interchange: dog-eared
Highway interchange: cloverleaf
Interconnecting highways with roads
Ramped highway-avenue interconnection
Yet more cloverleafs
Highway traffic-circle interchange
Highway interchange: yet another

Knowledge Tree
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