Many of the townhouses in the area around Sauchiehall Street were converted to office use, with one block demolished and replaced by a modernist office block out of keeping with the rest of the architecture other than in its height; the decline of traditional industries led to economic hardship across the city, and locally around Argyle Street; the St Andrews Halls suffered a major fire and were converted to an extension of the Mitchell Library; everything to the east of the library was disconnected (at least visually) from the city centre by the construction of the M8 motorway, with the majority of the old Anderston tenements also disappearing as a "Comprehensive Redevelopment Area" with brutalist apartments and tower blocks overlooking the motorway in their place; and in the southern portion of Sandyford around Kent Road, several blocks of tenements considered sub-standard due to sanitation issues (i.e.