There have been many reports of motorists using the lack of traffic on the roads during the Covid19 lockdown to flout the speed limits and now with more traffic back on the roads there is a danger that some may continue to drive at excessive speeds even after things are back to ‘normal’.
Behavioural Science in transportation (understanding the behaviour and motivations of transport users such as motorists and rail commuters etc) is a fascinating subject which plays a big part in the engineering and design of roads and their ‘furniture’ in an attempt to gently persuade drivers to modify their driving behaviour to something more appropriate.
There are many such psychological tactics in place to combat speeding but could we be doing more? What other engineering solutions could be implemented to stop excessive speeding? How do different countries tackle speeding on their roads? What could we learn from them?
If I made a mistake I would love to get feedback from you
where G is aircraft weight, S is aircraft wing area and ρ is atmosphere air density. Aircraft takeoff distance and accelerate-stop distance are related to runway condition. A dry runway and a wet runway are different when calculating distances. This article only deals with dry runway. TODdry is short for takeoff distance on a dry runway TODdry = Max {TODN -1,1.15TODN}
In Eq. (3), TODN-1 is the horizontal distance along the takeoff path, with one engine inoperative, from the start of the takeoff to the point at which the airplane is 10.7 meters above the takeoff surface; TODN is the horizontal distance along the takeoff path, with all engines operating, from the start of the takeoff to the point at which the airplane is 10.7 meters above the takeoff surface. ASDdry is short for accelerate-stop distance on a dry runway ASDdry =Max{ASDN-1,ASDN }
In Eq. (4), ASDN-1 is the sum of the distances below. (i) Accelerate the airplane from a standing start with all engines operating to VEF ; (ii) Allow the airplane to accelerate from VEF to the highest speed reached during the rejected takeoff, assuming the critical engine fails at VEF and the pilot takes the first action to reject the takeoff at the V1 for takeoff from a dry runway; (iii) Come to a full stop on a dry runway from V1; (iv) A distance equivalent to 2 seconds at the V1 for takeoff from a dry runway. ASDN is the sum of the distances below. (i) Accelerate the airplane from a standing start with all engines operating to V1 ; (ii) With all engines still operating, come to a full stop from V1; (iii) A distance equivalent to 2 seconds at the V1 for takeoff from a dry runway
If I made a mistake I would love to get feedback from you
where G is aircraft weight, S is aircraft wing area and ρ is atmosphere air density. Aircraft takeoff distance and accelerate-stop distance are related to runway condition. A dry runway and a wet runway are different when calculating distances. This article only deals with dry runway. TODdry is short for takeoff distance on a dry runway TODdry = Max {TODN -1,1.15TODN}
In Eq. (3), TODN-1 is the horizontal distance along the takeoff path, with one engine inoperative, from the start of the takeoff to the point at which the airplane is 10.7 meters above the takeoff surface; TODN is the horizontal distance along the takeoff path, with all engines operating, from the start of the takeoff to the point at which the airplane is 10.7 meters above the takeoff surface. ASDdry is short for accelerate-stop distance on a dry runway ASDdry =Max{ASDN-1,ASDN }
In Eq. (4), ASDN-1 is the sum of the distances below. (i) Accelerate the airplane from a standing start with all engines operating to VEF ; (ii) Allow the airplane to accelerate from VEF to the highest speed reached during the rejected takeoff, assuming the critical engine fails at VEF and the pilot takes the first action to reject the takeoff at the V1 for takeoff from a dry runway; (iii) Come to a full stop on a dry runway from V1; (iv) A distance equivalent to 2 seconds at the V1 for takeoff from a dry runway. ASDN is the sum of the distances below. (i) Accelerate the airplane from a standing start with all engines operating to V1 ; (ii) With all engines still operating, come to a full stop from V1; (iii) A distance equivalent to 2 seconds at the V1 for takeoff from a dry runway
