Abuja countries relocated their embassies to Abuja, and many maintain their former embassies as consulates in Lagos, the commercial capital of Nigeria. Abuja is the headquarters of the Economic Community of West African States (ECOWAS) and the regional headquarters of OPEC. Abuja and the FCT have experienced huge population growth; it has been reported that some areas around Abuja have been growing at 20% to 30% per year. Squatter settlements and towns have spread rapidly in and outside the city limits. Tens of thousands of people have been evicted since former FCT minister Nasir Ahmad el-Rufai started a demolition campaign in
Abuja Jonathan expressway, some portions of which are still under construction. A direct highway link to Minna in Niger State is still under construction. The A2 expressway links Abuja with Kaduna in the north and Lokoja in the south. There are also other highway links with the outlying region, such as that linking the suburb of Dutse Alhaji with the Lower Usuma and Gurara Dams, which supply water to the city. Abuja is on the route of the planned Lagos–Kano Standard Gauge Railway, which has been completed between Abuja and Kaduna. Trains for Kaduna depart from the Idu Railway Station in