Delphi:
It's because of topography and climate. The composition of the subgrade on which the roads sit are different. The Southern's clay base are more failure prone because of its composition. Also, the volume/amount of rainfall (and traffic) on these areas is a significant causative factor to road failure. Know which of the two sides that has more rainfall and then know the side that the roads ought to fail more. There's also a lot that's beyond a layman's comprehension .

mentorandfriend:
Just one journey, and you're beginning to form an opinion. Not so bro.

tpiah11:
That picture is from Cameroon I think.

But northern highways are better than southern ones in general due to the topography and climate.

fcbonsai:
most contract that are carried out in the north r done without d cintractors needing to bribe a thousand and one entities but here in the south, any contractor will have to bribe virtually all the 'bribeable' individuals before he successfully completes the project...all the numerous bribes will affect thw project financially leading to substandard materials being used

Elijahrona2:
My brother... Leave matter for Mattias

Hausa people (North in general) although are corrupt, don't forsake the needs of their own people cause they've got unity than elsewhere whereas southern people, even when asked to maintain their own village would eat the money.

Me am at Warri and I can't see the completed roads that uduaghan promised #voicemail.

handie:
Ministers of works 1999-2016.
Anthony Akhakon Anenih:1999–2003
Adeseye Ogunlewe, (July 2003–March 2006)
Obafemi Anibaba (March 2006–Sep 2006)
Cornelius Adebayo (Sep 2006–Jan 2007)
Hassan Muhammed Lawal (December 2008 -
March 2010)
Sen. Mohammed Sanusi Daggash(March 2010-July 2011).
Mike Oziegbe Onelememen(July 2011-May 2015).
Babatunde Raji Fashola(November 2015-date). In Nigeria's 17 years of democracy, Southerners have been ministers of works for 14 years.... And two of these ministers who accumulatively spent 8 years in office are from Edo state(a state with a high level of failed and bad federal roads).
Nigerian Presidents between 1999-2016: Olusegun Obasanjo(May 1999-May 2007)
Umaru Musa Yaradua(May 2007-May 2010]
Goodluck Ebele Jonathan(May 2010-May 2015)
Muhammadu Buhari(May 2015-date). The south have been in power for 12 of 16 years of Democracy. With this Evidence, Op the problem with Southern roads is the Southern leaders and elites.
ANOTHER BRILLIANT REASON GIVEN BY THIS BRILLIANT NLDER. God bless u @Akigbemaru

SolaceAndexIII:

DISCLAIMER: This topic refers to the route from Warri to Kano Only please.

I travelled recently from Warri to Kano and here are my observation about the HighWays:-
Southern Part
From Warri passing through Benin by pass, Ekpoma, Auchi, Okpella and Okene straight to Lokoja
POTHOLES: About 60% of the Road is filled with potholes, very dangerous I must say.
DOUBLE LANE: Less than 35% of the Road is double laned, Not good Either.
------------------------------
Northern Part
From Lokoja passing through Abuja, Niger, Kaduna and Zaria straight to Kano.
POTHOLES: Less than 20% of the Road is filled with Potholes, at least this is good.
DOUBLE LANE: Up to 90% of the Road is double laned, a laudable feat.

Thats my analysis, what's your opinion guys.
SOURCE: My Journey to the North.