Roads & Motorways

Florence North Ring Road

Reorganization of the bypass network
Owner/client Florence Municipality
Type of service Feasibility Study
Location Florence
Period 2006
Cost €

The project aims to create a ring road system around Florence and restore the old city road system arteries to their urban role of service and exchange routes for local traffic.

The geognostic surveys and consequent design process set out to achieve maximum integration with the aims of urban redevelopment and overall reorganization of city districts and the road system.

The corridor singled out for the alternative proposed routes passes at a tangent to the city of Florence, with origin between Piana di Castello and the Lippi Barsanti district north/north-west of Piana di Castello, and ends up near the Varlungo area.

The system examined, which was to complete the existing infrastructure network, led to the proposal of three possible alternatives. On the whole, the infrastructures designed were type 'B' according to the standards laid down in the Departmental Order of 5 November 2001 and consisted of two separate carriageways each with two 3.75 metre wide traffic lanes and 1.75-metre side verges.

Layout n.1 'Upper'

Total length about 11.3 km (9.71 km in underground); 2 tunnels ("Careggi", 4755 meters long; "Fiesole", 4955 meters long); 2 junctions (Castello, Coverciano).

Layout n.2 'Middle'

Total length about 10.6 km (7.91 km in underground); 4 tunnels ("Careggi", 2935 meters long; "Le Fonti", 140 meters long; "La Lastra", 630 meters long; "Fiesole", 4740 meters long); 4 junctions (Castello, Bolognese, Faentina, Coverciano); 1 viaduct ("Mugnone", 80 meters long).

Layout n.3 'Lower'

Total length about 10.1 km (7.62 km in underground); 3 tunnels ("Careggi", 3015 meters long; "La Lastra", 570 meters long; "Fiesole", 4030 meters long); 4 junctions (Castello, Bolognese, Faentina, Coverciano).

Besides complying with a strict analysis of the complex regional planning system, the process of defining the proposed routes was based on a large number of existing surveys including the following:

1) Geology, geomorphology and geotechnical characteristics of the land crossed (with support assessments drawn up by the Department of Earth Sciences of the University of Florence);

2) Hydraulic problems (river crossings, drainage criteria and roadbed water destination);

3) Naturalistic aspects;

4) Urban and hill landscape (visual and perceptive features, and guarantee of present use).

Once the different alternative routes were identified, the feasibility study involved carrying out analyses and a multicriteria assessment.