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Traffic Light in New Configuration: Traffic light for all road users – for smart city and for road users with color blindness and visual impairments

While retaining the color, position and signal sequence of the current configuration, it is possible to produce a traffic light where the shape of a signal corresponds to its color.

The red light signal has a square shape and the amber light signal has a triangular shape with its apex pointing to the signal – green or red – that is about to appear. The green signal retains its circular shape. A traditional three-section system may be used.

The basic three-section model of proposed traffic light may be transformed. A more compact and economical traffic light – two-section or one-section system – may be used, for example, in urban environments in order to increase the field of view and reduce street congestion.

The functions of the red, amber, green arrows and additional green arrows of the conventional traffic light (UNECE, 2006) are unchanged. For example, UNECE The Convention on Road Signs and Signals specifies: “Black arrows on a red, amber or green background may be used”.

The newly proposed traffic light configuration provides the following advantages:

• Social advantages and safety: The differently shaped lights may remove ambiguity for people with color perception disorders (color blinders) and those visually impaired. This may allow lifting restrictions/bans on driving license issuance currently applied to them in some countries.

• Information benefits and safety: The apex of the amber triangle markedly signaling the forthcoming (red/green) light signals allows road users to anticipate the control signals in advance. Information uncertainty of traffic light signals of the same circular shape is eliminated.

• Economic advantages: Manufacturing, installation and maintenance of compact traffic light (two-section or one-section system) in comparison with traditional three-section model is more cost-effective (reduced material intensity, size, transportation costs, etc.) and may help reduce street congestion.

Use is permitted for educational and cognitive purposes, Yuriy Kozin. https://doi.org/10.33492/JRS-D-20-00253

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