Why this instead of that?
Let's learn.

If its straight. Drivers will get bored and may sleep on wheels.

Its made curved for concentration and balance while driving esp for long routes

They're avoiding to construct a bridge.

To waste more funds, lolz.

Don't mind me. It was created that way to indirectly limit drivers speed since there is a hill. The reduced speeding of vehicles will reduce casualties and damage of properties.

Gradient issues

Because straight road leads to paradise and wobble road leads to destruction and the people of the world like to toll the part to destruction.

If you understand this comments i’ll send you new Nigerian Notes

its fun i'd want to drive on it fast and furious style

Pwettylinda:
Why this instead of that?
Let's learn.

It’s to steep for straight line road, Driving upwards would be hard for trucks, lorry etc, driving downward would be dangerous for both small cars and big truck etc.

Zonefree:
They're avoiding to construct a bridge.

A bridge needs to high points to connect them and continue the road, this has only one high point, hence a bridge is not needed, at all times the slope of the road cannot exceed a certain degrees, so car can comfortably maneuver around in balance.

The ground no level

They like snakes.

If this road dey naija
As u approach the first thing u will see: big sign board with

Slow down many have gone

courtesy of Hon Desmond E
[color=#550000][/color]weda the road straight or one corner according to Capt jack Sparrow "it's not so much the journey it's the destination"

This is due to costs and benefits of vertical and horizontal alignment in road construction.

Road or rail constructions require a lot of earthworks. If you want the road to go straight, you will do some cut and fill, the only area to get the earthworks to fill it are the closeby hills or mountains. This will cost them more money and time. Road or rail builders always consider the terrain before building them. The builder might be avoiding something very important or even more costly than the road.

Idiko1:
This is due to costs and benefits of vertical and horizontal alignment in road construction.

You are very correct.

Natbrowny:
If its straight. Drivers will get bored and may sleep on wheels.

Its made curved for concentration and balance while driving esp for long routes

So people who travel from Lagos to Benin often sleep on the road?

To curtail over speeding...

Lalasticlala I know you like learning

For tourists, just like as you are looking at it now, don't you like it? Isn't it beautiful

The terrain obviously.. it's likely there are settlements under the hills.

I've learned