1. High way and Transportation 2(Lab) LCIV 3034
Instructor : Prof. Dr. Shafik Jendia
Assistants : Eng.Mustafa abou foul

2. Horizontal Alignment
The geometric quality of road when seen from above in “plan” view.

3. Plan view and profile

4. Horizontal Alignment

5. Horizontal Alignment

6. عوامل تؤثر في تخطيط الافقي
طبوغرافية المنطقة
النقاط الحاكمة
وجود عوائق علي المسار
العوامل الاقتصادية

7. CROSS SECTION (قطاع الطريق)

8. General Types of Horizontal Alignment
Straight
Tangent-Curve
Continuously Curved Road

9. Straight Road

10. Tangent-Curve Alignment

13. Continuously Curved

15. Horizontal Curves Purpose:
To provide change in direction to the C.L of a road
Process:
When a vehicle transverse a horizontal curve, the centrifugal force acts horizontally outwards through the center of gravity of the vehicle

16. Sight distance
P = W V2 / g R

17. Horizontal Curves
The centrifugal force acting on a vehicle passing through a horizontal curve has two effects:
1- Overturning Effect
2-Transverse Skidding Effect

18. Types of Horizontal Curves
Simple Curve
Compound Curve
Broken Back Curve
Reverse Curve
Spiral

19. Simple Curve

20. Compound Curve

21. Broken Back Curve

22. Reverse Curve

23. Spiral

26. Geometry of Circular Curves

27. Geometry of Circular Curves

28. Geometry of Circular Curves