Motorways - Not Many Queues in Portugal!

Over the last two decades, Portugal has invested heavily in building an extensive motorway network, particularly to connect north with south. Much of this investment has been funded by generous grants by the European Union (EU). However, many miles of these modern motorways now resemble ghost roads as the economic crisis gripping Portugal, coupled with additional tolls, have discouraged vehicle travel.

Was it worthwhile investing in motorways in Portugal? There are some benefits outlined in the video below (note them down). But are they worth the cost?