Have you considered using 'Offset' values when symbolising the lines? you could do left / right offest on the superimposed route by by variying magnitude 0 1 3 5 etc Here is what you could do it: 1. Symbolise your route line layer by Category using the attribute holding colour i.e green / yellow 2. Then for each colour symbol, go Symbol Selector > Edit Symbol > Line Properties > Offeset ( where you can then set the offset values , which can be positive / negative numbers )
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