Sweden has imposed strict identification checks, while Austria, Germany, Norway and Denmark have ramped up their border controls. Italy has subsequently announced plans to increase controls along its frontier with Slovenia and in the wake of the November terrorist attacks in Paris, France has tightened up its border security.
Many governments say that the measures to slowly shut down the Schengen zone have been taken to prevent the rising numbers of refugees rerouting through Europe and entering their territory.
Instead, the ALDE suggests the European Commission works more efficiently to implement a European border and coast guard system to control Europe's external borders.
Guy Verhofstadt, leader of ALDE said: "Reintroducing border controls under exceptional circumstances for a short period of time may be legal, but it is far from a solution to the refugee and migration crisis in Europe."
I agree with @GuyVerhofstadt and ALDE that Schengen is not the problem; reintroducing internal border controls is not the solution.— Violeta Bulc (@Bulc_EU) January 6, 2016
More than a million refugees and migrants fled to Europe from Syria, Iraq, Afghanistan and Africa in 2015. It is expected the numbers are only going to increase.
"The significant number of migrants and refugees that came to Europe in 2015 were fleeing war, conflict and misery. All this, together with the lack of a real common external border, are true causes of the current crisis and not the Schengen area of freedom of movement."
The quota system, proposed by the European Commission (EC) has been rejected by many European countries. Only 86 refugees who arrived in Italy and Greece in 2015 have been relocated, despite a pledge made by the EC to resettle 160,000 people.
"The Commission has to verify whether the reintroduction of border controls is necessary and proportionate. So far the reintroduction of internal border controls has only contributed to create a domino effect."
While the decisions made by individual countries are repeated across Europe, leaders' discussions continue on a path to nowhere.