On 1 January 1988 the transit traffic to West Berlin was redirected to the new East German Stolpe checkpoint (a part of today's Hohen Neuendorf)/West Berlin-Heiligensee. From 1988 to 9 November 1989 the Heerstraße border crossing was open for the highly restricted traffic between West Berlin and East Germany. Highly restricted in this case means citizens of West Berlin must apply for a visiting permit to visit relatives; while only GDR citizens above the age of 65 could apply to visit relatives in West Berlin. Eastern controls were slowly eased into spot checks and finally abolished on 30 June 1990, the day East and West introduced the union concerning currency, economy and social safety ().