|
First Construction Period (1967 – 1975)
The motorway
construction started simultaneously at both ends of the motorway, between
Messina and Rocca di Caprileone in the east and from Buonfornello to Cefalů
towards the Palermo end. These two sections were be built during the 1967-1975
period prior to the 8-year suspension of financing which was decreed by Law no.
492 of 1975.
Messina-Rocca di
Caprileone (96.6 km)
The stretch of
motorway between Messina and Rocca di Capileone (96.6 km.) begins at the Tremestrieri interchange where it joins
the Messina-Catania motorway and for 8.6 km. to the Boccetta exit, becomes the beltway
around Messina with exits accessing the main routes of penetration into the city
and noteworthy works of construction (6 viaducts and 5 tunnels with separate
carriage-ways which make up 31% of the entire urban stretch of highway).
The poor
geotechnical characteristics of the lan d required special structural intervention
on tunnel entrances and viaduct foundations. In particular, wells of wide
diameter, rectangular shafts, and shafts connected to arched diaphragms were
used, as well as consolidation and freezing techniques while avoiding
alteration of the morphology of the sites and damage to the spontaneous
vegetation which is a peculiar characteristic of the landscape on the northern
side of the Peloritani Mountains.
Starting at the
Boccetta exit, the passage through the Peloritani Mountains begins with a 15
km. stretch of motorway which reaches the toll station in the town of
Divieto. This section is also
characterized by particularly difficult morphological and geological conditions
which required major structural adaptations, like the Trapani and Ritiro viaducrs and the Telegrafo tunnel near which it was preferred to intersect the top
and bottom carriageways in order to facilitate the placement of the
entrances. In this manner, the
direction of traffic inside the Telegrafo tunnel was inverted.
The flattest part
of Sicily’s Tyrrhenian Coast begins at the toll station in Divieto and extends
for approximately 45 km. to Patti. The
structural works here are more modest with one of the most memorable being the Capo Tindari tunnel which is 2,150 meters long.
Furthermore, the level ground permitted the use of a wider 12 m. median
strip.
For the remaining
28 km. from Patti to Rocca di Caprileone
the morphological and geographic characteristics which were once again very
difficult and required risky planning decisions like, for instance, the Capo Calava' and Capo d'Orlando tunnels
which in any case guaranteed maximum respect for the coastal landscape. The greatest effort was made in developing
the Capo Calava' tunnel where the presence of toxic gas leaks of volcanic origin
made it necessary to intervene with special water-proofing of the phillades and
other volcanic rock faces with a 5
m. thick cement and resin screen.
Buonfornello–Cefalů (17.8 km)
Priority was also
accorded to the functional section between Buonfornello and Cefalu', at the
Palermo end of the motorway, which was the second to be built, with a toll
station in Buonfornello and a temporary exit on State Road no. 113 in Cefalu'.
Among the
structural works of note in this section, are the Roccella and Lascari viaducts, the tunnels at the top of the bluff in Cefalu' and the complicated
intersection with the Catania-Palermo motorway on the Imera River.
Read more about the Messina - Palermo
Motorway :
·
Background
·
Second Construction period
·
Main Viaducts
·
Main Tunnels
|