Guard The Cache !!!! 5 Traditional Cache

Anyway here is a little information for those (like me) who don't know much about guardrails.

In traffic engineering, guardrails prevent vehicles from veering
off the roadway into oncoming traffic, crashing against solid
objects or falling into a ravine. A secondary objective is keeping
the vehicle upright while deflected along the guardrail. The
problem with this is that a guardrail of the optimum height for a
car might not keep a truck from toppling over it, while a motorbike
might slip under a higher rail. In most cases guardrails would not
be able to withstand the impact of a vehicle just by the strength
of the individual posts in the area hit by the vehicle. Instead,
the guardrail is effectively one strong band that transfers the
force of the vehicle to multiple posts beyond the impact area or
into a ground anchor at the end of the guardrail. Newer concrete
barriers, while usually strong enough to withstand direct hits by
cars, still work on a similar principle in deflecting heavier
vehicles such as trucks. Though they have usually prevented far
more serious accidents, guardrails have frequently ranked as among
the highest sources of injury and fatality in a fixed-object
crash.[1] Among the primary reasons for this is the type of
treatment used at the end of the guardrail facing oncoming traffic.
Most end designs will either deflect, absorb, or launch the
vehicle. Deflection causes the vehicle to be redirected back into
traffic – particularly dangerous on undivided roadways, as the
vehicle may travel into oncoming traffic. Absorption is when the
force of impact is directly transferred between the vehicle and
guardrail, which may cause the end to puncture the vehicle. Lastly,
a vehicle can become airborne upon striking a guardrail's end,
which may negate the purpose of the guardrail, if the vehicle
continues beyond the guardrail and strikes the object the guardrail
was protecting. Additionally, an airborne vehicle is likely to
collide in a manner that the vehicle was not designed for,
increasing the risk of failure in the vehicle's collision safety
systems. Collapsible guard rails are safer than rigid ones, since a
longer collision duration will result in a smaller average impact
force. Transportation engineers limit the guardrails as much as
possible, as guardrails should only be placed when the roadside
conditions pose a greater threat than the guardrail itself. In
fact, in the hierarchy of five roadside safety treatments,
shielding with guardrails ranks fourth. Therefore, while guardrails
are often added as a retrofit to existing roads, newer roads are
designed to minimize roadside threats, whether that may include
aligning a road on a smoother curve or filling in a ravine which
would eliminate the need for guardrail altogether. In addition to
new research into end treatments, public awareness among both
drivers and engineers has been gradually reducing injuries and
fatalities due to guardrails. There are four general types of
guardrail, ranging from weakest and inexpensive to strongest and
expensive; cable and wood posts, steel and wood/metal posts, steel
box-beam, and concrete barriers. While cheaper guardrail is the
weakest, often being destroyed from the impact of a light vehicle,
it is inexpensive and quick to repair, so this is frequently used
in low-traffic rural areas. On the other hand, concrete barriers
can usually withstand direct hits from vehicles as heavy as trucks,
making them well suited to high volume routes such as freeways.
While rarely damaged, they would be considerably more expensive and
time-consuming to repair. Concrete barriers are frequently
installed in the median, being expected to withstand frequent
impacts from both sides, while the shoulders of the road often has
cheaper guardrail. Guardrails are sometimes placed beneath the
sides of high-sided heavy vehicles (such as lorries, semi-trucks,
etc). to prevent smaller vehicles from passing underneath the
heavier vehicle during a collision and being crushed.