Highways & Roadwork Calculator app for iPhone and iPad

Highway and Road Calculator contains 37 Calculators to calculate different Highway, Road and Civil Engineering parameters.
- Available in Imperial (USCS) and Metric Units (SI).
App has following list of 37 Calculators:

1. Radius of Curve - Arc Definition (Circular Curves)
2. Radius of Curve - Chord Definition (Circular Curves)
3. Degree of Curve - Arc Definition (Circular Curves)
4. Degree of Curve - Chord Definition (Circular Curves)
5. Tangent Distance (Circular Curves)
6. External Distance (Circular Curves)
7. Midordinate (Circular Curves)
8. Length of Long Chord (Circular Curves)
9. Length of Curve (Circular Curves)
10. Central Angle for Portion of Curve - Arc Definition (Circular Curves)
11. Central Angle for Portion of Curve - Chord Definition (Circular Curves)
12. Tangent Offset (Circular Curves)
13. Chord Offset (Circular Curves)
14. Rate of Change of Grade (Parabolic Curves)
15. Elevation of Point of Vertical Curvature (Parabolic Curves)
16. Elevation of Point x distant from Point of Vertical Curvature (Parabolic Curves)
17. Distance from Point of Vertical Curvature to Lowest Point on a Sag Curve/Highest Point on a Summit Curve (Parabolic Curves)
18. Elevation of Lowest Point on a Sag Curve/Highest Point on a Summit Curve (Parabolic Curves)
19. Minimum Length of Crest Vertical Curves (Sight Distance less than Length of Vertical Curves)
20. Minimum Length of Crest Vertical Curves (Sight Distance greater than Length of Vertical Curves)
21. Rate of Vertical Curvature
22. Structural Number (Surface Course)
23. Structural Number (Base Course)
24. Structural Number (Subbase Course)
25. Structural Number (Pavements)
26. Minimum Length of Spiral Curve
27. Thrust of Structure (Culverts)
28. Flexibility Factor
29. Ring-Compression Stress
30. Horizontal Deflection of Pipe (Iowa Formula)
31. Design Pressure - Corrugated Steel Structures (Height of Cover less than Pipe Diameter)
32. Design Pressure - Corrugated Steel Structures (Height of Cover greater than Pipe Diameter)
33. Compressive Thrust (Conduit Walls)
34. Ultimate Wall Stress (294 greater than Ratio of Pipe Diameter and Radius of Gyration of Pipe Cross Section less than 500)
35. Ultimate Wall Stress (Ratio of Pipe Diameter and Radius of Gyration of Pipe Cross Section greater than 500)
36. Design Stress of Wall
37. Pipe Wall Area