It is observed by Naijadriva that over the years, that road has been abandoned by the government. The bad spots on this road starts Oyigbo section(Rivers State) to Aba, through Umuahia, which has the major section(Abia State), then Okigwe (Imo State) to Enugu.

For Example, It took about 20-30mins from Port Harcourt to Aba but due to bad road, it takes longer (1-2hrs depending on whether there is rush hours or not).

See his post below…