100 zona despejada rdg ch3 craig
TRANSCRIPT
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Zona Despejada
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¿Qué es una ZD?
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Definición de ZD “Más Clara”
Área traspasable que
comienza en el borde del
carril de tránsito, incluye la
banquina y se extiende
lateralmente una distancia
suficiente para permitir que
un conductor se detenga o
vuelva al camino antes de
encontrar un peligro o volcar
Zona Despejada
Carril Tránsito
Banquina
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Factores Influyentes en ZD• Velocidad Directriz • Volumen de Tránsito• Talud de Terraplén• Curvatura Horizontal
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Ancho Mínimo de ZDDesign Design Fill Slopes Cut SlopesSpeed ADT 1:6 or Flatter 1:5 to 1:4 1:3 1:3 1:5 to 1:4 1:6 or Flatter40 mph Under 750 7' - 10' 7' - 10' * * 7' - 10' 7' - 10' 7' - 10'
or 750-1500 10' - 12' 12' - 14' * * 10' - 12' 10' - 12' 10' - 12'Less 1500-6000 12' - 14' 14' - 16' * * 12' - 14' 12' - 14' 12' - 14'
Over 6000 14' - 16' 16' - 18' * * 14' - 16' 14' - 16' 14' - 16'Under 750 10' - 12' 12' - 14' * * 8' - 10' 8' - 10' 10' - 12'
45 - 50 750-1500 12' - 14' 16' - 20' * * 10' - 12' 12' - 14' 14' - 16'mph 1500-6000 16' - 18' 20' - 26' * * 12' - 14' 14' - 16' 16' - 18'
Over 6000 18' - 20' 24' - 28' * * 14' - 16' 18' - 20' 20' - 22'Under 750 12' - 14' 14' - 18' * * 8- - 10' 10' - 12' 10' - 12'
55 750-1500 16' - 18' 20' - 24' * * 10' - 12' 14' - 16' 16' - 18'mph 1500-6000 20' - 22' 24' - 30' * * 14' - 16' 16' - 18' 20' - 22'
Over 6000 22' - 24' 26' - 32' * * * 16' - 18' 20' - 22' 22' - 24'Under 750 16' - 18' 20' - 24' * * * 10' - 12' 12' - 14' 14' - 16'
60 750-1500 20' - 24' 26' - 32' * * * 12' - 14' 16' - 18' 20' - 22'mph 1500-6000 26' - 30' 32' - 40' * * * 14' - 18' 18' - 22' 24' - 26'
Over 6000 30' - 32' * 36' - 40' * * * 20' - 22' 24' - 26' 26' - 28'Under 750 18' - 20' 20' - 26' * * * 10' - 12' 14' - 16' 14' - 16'
65 - 70 750-1500 24' - 26' 28' - 36' * * * 12' - 16' 18' - 20' 20' - 22'mph 1500-6000 28' - 32' * 34' - 42' * * * 16' - 20' 22' - 24' 26' - 28'
Over 6000 30' - 34' * 38' - 46' * * * 22' - 24' 26' - 30' 28' - 30'
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Taludes y ZD
14
31
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Empinamientos de Taludes• Recuperable - ≤ 1:4 **
• No-Recuperable: 1:3 to 1:4 **
• Crítico: ≥ 1:3**Traspasable
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Recuperable
14
(Traspasable)
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No-Recuperable
14
3
1(Traspasable)
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Crítico
(No Traspasable) 3
1
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Curvas Horizontales y ZD
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Tabla 3.2 Ajustes por Curva Horizontal
Radius Design Speed (mph)
(ft) 40 45 50 55 60 65 70
2860 1.1 1.1 1.1 1.2 1.2 1.2 1.3
2290 1.1 1.1 1.2 1.2 1.2 1.3 1.3
1910 1.1 1.2 1.2 1.2 1.3 1.3 1.4
1640 1.1 1.2 1.2 1.3 1.3 1.4 1.5
1430 1.2 1.2 1.3 1.3 1.4 1.4 XX
1270 1.2 1.2 1.3 1.3 1.4 1.5 XX
1150 1.2 1.2 1.3 1.4 1.5 XX XX
950 1.2 1.3 1.4 1.5 1.5 XX XX
820 1.3 1.3 1.4 1.5 XX XX XX
720 1.3 1.4 1.5 XX XX XX XX
640 1.3 1.4 1.5 XX XX XX XX
570 1.4 1.5 XX XX XX XX XX
380 1.5 XX XX XX XX XX XX
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Figura 3.6: Cunetas en V
Figure 3.6
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Estudios de Casos ZD
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Country road
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Pavement markings
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Add edge lines
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Geometric and roadside inconsistency
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Mantener Coherencia de Diseño
¡No Sorprenda al Conductor!!
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Optimum design