I agree with Mr Lim Chee Khiam that LED lights at pedestrian crossings is not a good idea (LED lights send wrong message to 'smartphone zombies'; May 12).

Smartphone users should look out for traffic and not look at their smartphones while walking on the road. This is a fundamental safety concept.

They may not realise that they are endangering not only themselves but also other road users.

Smartphone users are everywhere - along crowded streets, shopping malls, MRT stations and bus interchanges. Collisions with them are becoming more frequent.

Instead of installing LED lights, the Land Transport Authority should consider having road signs to warn pedestrians not to use their smartphones when crossing roads.

In the interest of all road users, the authorities may wish to consider imposing penalties against those who use smartphones while crossing roads. This is similar to motorists who are booked for using their smartphones while driving.

Andrew Seow Chwee Guan