Indian Road Signs

Here is something funny about Indian Road Signs,
While travelling across the country, I've noticed that most of the time "Speed Bump" (Speed Breaker) signs are posted almost on the edge of bump or sometime you will even see after the actual bump.

Isn't it ? that this sign is to warn the driver and not to inform the driver that
" You've crossed Speed Bump"

And Boy ! Do we really we need so many bump at single place ?