From Costain, take a local bus (Danfo) or Keke NAPEP towards Ojuelegba or Yaba. This will get you to a major bus park.

From Ojuelegba/Yaba, find a direct bus heading towards the Lagos-Ibadan Expressway, specifically to a park that operates inter-state routes or buses heading 'along' the expressway. You might need to get a bus to Berger Bus Stop first.

At Berger Bus Stop or a designated park (e.g., MKO Abiola Gardens), board an interstate bus or a 'shuttle' heading along the Lagos-Ibadan Expressway. Tell the driver/conductor you are going towards the Ikorodu Road axis or need to alight at a point where you can easily connect back into Lagos. This segment covers a significant portion of the 358.7km.

From the Lagos-Ibadan Expressway, depending on where you alight (e.g., around Ojota/Ketu if the bus drops you there after circling back), take a BRT or Danfo along Ikorodu Road heading towards Western Avenue/Costain direction (since the ground truth path circles back).

Continue on the major roads, potentially passing through Western Avenue. You will then need to head towards the Lagos-Badagry Expressway axis. This will likely involve multiple bus changes. Look for buses going to Mile 2 or Maza Maza.

From Maza Maza or Mile 2, board a bus or Keke heading towards Badagry on the Lagos-Badagry Expressway. Alight around the Era Road axis (Badagry area).

From Era Road, you will need to find local transport (Keke NAPEP or Danfo) to connect to Ikotun. This will be the final, most complex leg of this circuitous journey. You will likely need to take several local buses/Kekes passing through various suburbs to reach Ikotun, as Ikotun is in Alimosho, far from Badagry. This connection is not direct and requires navigating local routes.