I wish ungekua na akili but bad luck huna
,dual carriage are many here in dar es salaam and it's not talk of the town in any ways,
I Know you can Google, Morogoro road which is the gateway has been dual carriage be even you were born...
New bagamoyo road,Mandela road,Nyerere road,Kawawa road,ali hassan Mwinyi road etc. ..
You can start from tegeta up to mbagala 50 km even more on dual carriage road,crossing to airport ,back to CBD, away from CBD and around major dar wards...I was really disapointed to the way you named it looks like nakuru I don't know if nakuru is even qualified to be called a city or it's just big village