medical sector, the economic dynamic developed positively for the first time in more than 30 years. At this time, the Boston-based Massachusetts General Hospital, Beth Israel Deaconess Medical Centre and Brigham and Women's Hospital were among the leading medical institutions in medical innovations, among others. But even the general science sector, which has always been important to Boston's economic growth, has attracted more students during this time. However, the already increasing traffic since the 1920s, however, also led to new problems. These were not easy to solve in Boston, as the city centre was one of the oldest and densest in the United States. Exactly this circumstance saw the responsible local politicians in the late 1940s, however, as part of the problem. Thus, in the following years, a four-kilometre-long, six-lane city highway was laid as a raised elevated road across the heart of the city. However, this solved the traffic problems only for a short time and had also caused a fragmentation of the city centre. In order to mitigate the urban consequences of the road break and at the same