"A taller street lamp would require a ladder to reach the hatch while someone can touch the opening on a trident lamp standing on a pavement," an engineer said. This explains why trident lamp posts are often found dislodged from the base or inclined after a strong gust of wind or a storm. Trident lamp posts are also lighter compared to other street lamps, weighing just about 50kg each and around 3.5 metres in height. What makes open hatches on trident lamp posts more dangerous than those on conventional street lamps is height. There are 12,000 such trident lamp posts in the CMC belt.

Source: The Telegraph August 10, 2016 21:22 UTC