How To allow Adequate Clearance
How To Allow Adequate Clearance
How To Allow Adequate Clearance (Defensive Driving)
Adequate Clearance is where you need to protect your car from a collision to the front, side or rear, like putting a Safety Bubble abound it. To achieve this Safety Bubble around our car, we use four rules:
1) 2 - Second Rule, 2) Door Width Rule, 3) Diagonal Rule, 4) Queuing Rule
2 Second Rule:
The 2 Second Rule is to protect the front and rear of our car, adding additional seconds as necessary.
Good conditions for a 2 second rule:
Environment - Daylight, clear weather, dry clean level surface 2 sec
Vehicle - All new / good condition 2 sec
Driver - Fit, alert, good sight, concentrating 2 sec
Bad conditions demanding extra time in addition to 2 seconds:
Environment - Vehicle behind to close, night no street lights 2/3 sec
Vehicle - Tyre inflation unchecked, dirty windows 2/3 sec
Driver - Fatigued, mental distraction (Tom-Tom/stereo) 2 sec
Choose a point like a road sign, when the vehicle in front passes that point, say out loud "Only a fool breaks the two-second rule"
Check your position in relation to your chosen point as you finish saying this. If you have already passed the point, you are driving too close to the vehicle in front and need to pull back. If a driver behind is to close (Tailgating) give yourself more room to the front, this will give you more time to act if necessary.
Door Width Rule:
Secondly we must also maintain a safe space at the sides of our vehicle - the Door Width Rule.
"When travelling at 30 mph never become closer than a door's width, i.e. 1 metre (3 feet) when passing a parked vehicle, to allow for the possibility of a door opening or pedestrians moving out from the parked cars".
Wherever there is less space due to hazards on both sides of your vehicle, speed must be reduced in proportion.When travelling at higher speeds, a greater width of safety margin must be maintained.
"Less Space Less Speed"
Thirdly for maintaining space is the 'Diagonal Rule' and which states "Always position yourself DIAGONALLY to other vehicles, when travelling in a multilane system at a similar speed to other traffic", i.e. don't travel alongside another vehicle which is steering, or which may steer, as you may come into contact.
It is necessary to use this rule in any multilane system, that is, anywhere there are 2 or more lanes in your direction and when traffic is travelling similar speeds to each other. At a roundabout, entering, and exiting, always use the Diagonal rule.
Never drive alongside a vehicle especially a large vehicle, always remain Diagonally behind as this avoids most problems and retains an escape route.
And fourthly, to protect our front when stationary we have the 'Queuing Distance Rule'. When stopping in a traffic queue, it is sufficient that the driver can see the rear tyres of the car ahead and some tarmac (road),
Adequate Clearance is all about using just 4 rules to maintain a SAFE SPACE