Many accidents have occurred in broad daylight, without the

Many accidents have occurred in broad daylight, without the presence of rain or fog, in the tunnel of Juan Palomar y Arias and Ser Servador Público from the south to the south (Aqueduct to Vallarta), Residents of the Real Zone pressured the SIOP to review design. A restrictive signal of 40 kph is located 100 m before PC and another of 25 kph 50 m before PC. The speed limit on Juan Palomar y Arias avenue and Public Server is 50 kph. You as an expert in geometric design have been hired by the SIOP to review the aforementioned intersection and decide if the speed limits are adequate, there are design errors or simply the accidents are due to reckless driving, since almost all the vehicles involved They are of recent model and with security elements. If there are errors, the SIOP will review the speed limits, otherwise it will install metal buoys before PC and PT. As an expert, you know that real measurements of the work are needed and not only rely on the design data of the SIOP, therefore, your work team has determined the following geometric properties:

Lane width at tangent 3.50 m

Interior dimensions and exterior in tangent = 0.50 m each

Concrete curb 0.25 m

The radius of the curve (R) = 55 m

Elevation 4%

Length of the horizontal curve 85 m

Initial slope G1- -3% and final G2- +3 5%

Length of the vertical curve 360 m

Speed limit of 25 kph located 50 m before PC

• Design speed 25 kph (fs = 0.21 and f-0.40)

The 40 kph sign is located 50 m before the 25 kph vertical sign. The speed of Public Server and Juan Palomar y Arias is 50 kph.

• The curved road is 7.5 m and the crown is 8.5 m

• The design vehicle is a DE6100 You know that, if only one of the elements is poorly designed, the curve does not meet the requirements and there must be restrictions on speed.