Turbo Roundabout
Design characteristics
The turbo-roundabout has specific design characteristics, which make this type of roundabout unique:
- Nested spiral lane at one or more entries.
- Yield to no more than two lanes (deviation might be possible).
- Smooth spiral markings.
- Raised and mountable lane dividers.
- At least one lane offers a choice for direction.
- At least two exit legs have two exit lanes.
- Approach legs are aligned perpendicularly to the circulatory lanes.
- Roundabout signage cuts off the horizon for optimal recognition.
- Aprons in central island and armpit are established to keep narrow lane width for passenger vehicles but provide additional driving surface for HGVs.
Roundabout Design Software for Turbo Roundabouts
TORUS Roundabouts from Transoft Solutions has features for designing turbo roundabouts or checking vehicle paths and fastest paths on circular or non-circular roundabouts. This software represents the most sophisticated roundabout design software available in the industry.