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Engineering Projects: Rotonda de Gir, Zona Cruïlla de la C.G. núm. 1 amb la C.S. de Bixessarri

Infrastructure


Place:

Sant Julià de Lòria (Principat d'Andorra)


Date: 2004-2005
Rotonda de Gir, Zona Cruïlla de la C.G. núm. 1 amb la C.S. de Bixessarri, Engineering (Principality of Andorra)

Rotonda de Gir, Zona Cruïlla de la C.G. núm. 1 amb la C.S. de Bixessarri

This project references: the "Roundabout turn in the main road number 1, Bixessarri area, Sant Julia de Loria parish.
 
This roundabout was held as a solution to traffic problems, allowing the change of vehicles direction, better movement and access to the  Bixessarri village and others in the same area.

Includes public lighting project from the parish entrance to the city centre of Sant Julia de Loria and the replacement of pavements for asphalt concrete pavement although the latter is not included in the project.

The roundabout is placed centered on the axis of the current main road No. 1 in an area of Clothoid parameter A = 132. The axis of the new platform matches the current axis. The longitudinal gradients ranging from 2.3% South side and 3.93%  in the North.

The inner radius of entry and exit of the roundabout in direction Sant Julia are 30.00 m while associates are contrary to 40.85 m.

The existing road links to ensure the transition to the type section of the current General Crta No. 1 with two lanes of 3.15 in the direction of Andorra and a 3 and a 3.10 in the direction of Sant Julia.

Both directions of traffic have a shoulder of 0.85 m which facilitates the movement of cyclists. The senses are separated by double solid line approximately 12.20 m separately.

The access road to private property has an inner radius of 28.45 m. at the entrance to the property and 10.45 m at the exit to the road.

The rails are four feet wide with no shoulder.