What is wrong with this road sign:

Memphis 7 mi (11.263 km)?

In a number, significant figures are the digits that indicate the quantity of a thing. These are crucial in mathematical calculations.

In the road sign Memphis 7 mi, there is one significant digit. However, in 11.263 km, there are five significant digits. The value in kilometers is more accurate and precise than that in miles.

Road signs convey important information to the drivers.These signs help in ensuring road safety. Pictures are preferred over words for making road signs as they are easier for people to understand and recognize. Road signs are divided into four groups:

1. Regulatory: They inform about the prohibition of entry, left or right turn, etc.

2. Warning: They give a warning regarding the changes in the road ahead.

3. Guidance: They give information about the route followed.

4. Temporary: They convey entry restrictions to a place due to an accident or construction work.