This ancient innovation is particularly evident when looking at how roads were built in Pompeii.
These prominent stepping stones acted as ancient crosswalks.
Natural reflectors were also incorporated into some of the roads in the form of small white stones.
Photo: Ratikova/Depositphotos
These paler rocks were set among the larger slabs to help people find their way at night.
The moon would reflect on the stones, creating enough light for people to be able to see.
Drainage was also particularly important since most homes in Pompeii had no direct sewer connection.
Refuse was washed into the street, making these stepping stones critical.
Raised sidewalks with drainage also allowed people to move freely without putting their feet in sewage.
Innovations like these make Pompeii a fascinating place to visit and a wonderful example of ancient Roman urban planning.
