What is the Highest Safe Approach Speed for Uncontrolled Intersections?

In summary, to determine the highest safe approach speed when going through an intersection, you can start by looking at the speed limit on the road. If it's an uncontrolled intersection, the safe speed is calculated based on two cars being able to stop before a collision. For uncontrolled railroad crossings, the speed limit is lowered to 15 mph if visibility is limited, and trains may have a maximum speed of 50-70 mph.
  • #1
Lanzzdub
2
0
I was wondering how'd you find out the highest safe approach speed when going through an intersection.

P.S. Could you please explain in detail.
Thanks !
 
Physics news on Phys.org
  • #2
huh ?? :) safest approach and going through are a contradiction

maybe the speed limit that is set on that particular road would be a good place to start

what are you trying to get at/understand ?
maybe some more info from you about a particular situation etc ??

cheers
Dave
 
  • #3
If it's an uncontrolled intersection with no stop signs (rare these days), then the safe speed is set based on two cars approaching intersection from different directions, being able to see each other and for both to be able to stop before a collision, plus some margin of safety.

In the case of an uncontrolled rail road crossing, if you can't see 400 feet in both directions while within 100 feet of the tracks, the speed limit in California is 15mph. I'm not sure of the maximum speed allowed for trains through such intersections, but it's probably between 50 and 70 mph. At 70 mph, the train travels 102 feet per second, so 400 feet would translate into about 4 seconds of reaction time.
 

Related to What is the Highest Safe Approach Speed for Uncontrolled Intersections?

What is the definition of Highest Safe Approach Speed?

Highest Safe Approach Speed is the maximum speed at which an aircraft can safely approach a runway for landing. It takes into consideration factors such as the size and weight of the aircraft, weather conditions, and runway length.

Why is Highest Safe Approach Speed important?

Highest Safe Approach Speed is important because it ensures that the aircraft can safely land on the runway without risking damage to the aircraft or endangering the passengers and crew on board. It also helps to maintain safe separation between aircraft and prevent runway overrun accidents.

How is Highest Safe Approach Speed calculated?

Highest Safe Approach Speed is calculated by taking into account the aircraft's weight, air density, and configuration (flaps and landing gear), as well as any limiting factors such as runway length, obstacles, and wind conditions. This calculation is typically performed by the aircraft's flight management system or by the pilot using performance charts.

What factors can affect the Highest Safe Approach Speed?

The Highest Safe Approach Speed can be affected by various factors such as changes in the aircraft's weight, weather conditions (such as wind or precipitation), and runway conditions (such as runway slope or surface condition). These factors can impact the aircraft's performance and may require adjustments to the approach speed.

What happens if the aircraft exceeds the Highest Safe Approach Speed?

If the aircraft exceeds the Highest Safe Approach Speed, it can result in a runway overrun or loss of control during landing. This can lead to severe damage to the aircraft and potential injuries to passengers and crew. It is crucial for pilots to adhere to the recommended approach speed to ensure a safe landing.

Similar threads

  • Mechanics
Replies
11
Views
2K
  • Mechanics
Replies
12
Views
4K
Replies
1
Views
778
Replies
8
Views
1K
Replies
5
Views
1K
  • Precalculus Mathematics Homework Help
Replies
5
Views
967
  • Mechanics
Replies
6
Views
1K
  • Introductory Physics Homework Help
Replies
4
Views
779
Replies
19
Views
2K
Back
Top