Slow driving impedes traffic. Blocking other drivers can lead to an accident, more weaving in and out of traffic. If anyone drives slower than the minimum speed they can halt the traffic flow and create a dangerous condition. Even if there is no minimum speed limit, those driving too slow can be as dangerous as those who drive too fast. Many people attest to western laws as being the standard, there are several states in usa which fine drivers driving slow more than the 85th percentile of the speed limit with jail and fines both, also in UK. A driver who insists on moving along well below the speed limit may incite other drivers to overtake them, particularly if the driver is at the head of traffic on a two-lane road. While only the passing motorist might be blamed if a collision results from this action, the slow motorist has certainly played a part in the accident.
According to the Federal Highway Administration (FHWA) Methods and Practices for Setting Speed Limits, the occurrence of a large number of crashes involving turning maneuver partly explains the increased risk for motorists traveling slower than average and confirms the importance of safety programs involving turn lanes, access control, grade separation, and other measures to reduce conflicts resulting from large differences in travel speeds.
3 Dangers of Driving Too Slow
The dangers of driving too slowly aren’t as obvious as the risks of speeding but they do exist. Driving much slower than the posted speed limit or driving too slowly in the passing lane can cause dangerous situations on the roadways.
1. Impeding Traffic
Driving slower than the posted speed limit when conditions are normal can impact the flow of traffic and even block lanes. Additionally, if a driver drives slowly in the right lane, passing it can negatively impact the ability of other vehicles to move smoothly. It’s recommended that slower moving traffic move to the left lane to allow vehicles to pass on the right.
2. Leading Other Drivers to Make Quick Adjustments
Speed limits are posted for a reason. It keeps the traffic moving at a predicted speed. When a vehicle is traveling well under the speed limit, other drivers on the road must make unexpected adjustments. These changes can lead to dangerous actions — stopping or slowing suddenly, abruptly changing lanes or passing on the left side instead of in the passing lane.
3. Increasing the Risk for Road Rage
Road rage is never the appropriate response to any situation on the road but a driver driving slowly in a passing lane is a common annoyance on the road and can quickly drain the patience of fellow drivers.
Driving too slowly can make other drivers around you constantly brake and speed up. It can be frustrating for other drivers, cause confusion and could lead to an accident. Forcing other drivers to adapt to the slower speed could force the other drivers to possibly pass on the left side (if slow driver is impeding the center or right lane). Slow drivers can affect how others react to situations. Ex: waiting behind a slow driver to make a turn, that driver takes too long and then you must react different and possibly make an unsafe judgement call. Other drivers may tailgate the slow driver, to “push” them along. When drivers don’t keep up with the prevailing road conditions, they become a danger to others. Many studies have produced data that show slow drivers pose a significant risk on the roads, simply because they are more likely to be overtaken, and tempt other road users into risky maneuvers.
The tendency to pass other drivers is consistent with personal attitudes of drivers. More than half (53%) of drivers agree at least somewhat that they often get impatient with slow drivers. U-curve study of USA found the both the faster driver and the slower driver had a higher risk of being involved in an accident.
https://ntlrepository.blob.core.wind...docs/speed.htm
The occurrence of a large number of crashes involving turning maneuver partly explains the increased risk for motorists traveling slower than average and confirms the importance of safety programs involving turn lanes, access control, grade separation, and other measures to reduce conflicts resulting from large differences in travel speeds.
According to Penn state
https://sites.psu.edu/siowfa15/2015/...-faster-safer/ The main problem on roads that causes accidents is the differences in speed, rather than speed itself. While some people are going faster than other, some go slower which causes the traffic to flow unevenly. If the speeds limits are raised to comply with the actual travel speeds, the roads become safer, because the traffic now flows more evenly and people start going to the same speeds. This actually shows that drivers are not affected by the speed limits that much, but rather slow drivers. The National Highway Traffic Safety Administration (NHTSA) Says that only 30% of the accidents that are fatal are accidents in which the driver was speeding. This does not mean that the speeding actually is the cause of the accident. A study conducted by the Florida Department of Transportation says that accidents that were caused by speeding is actually 2.2%. This shows that if people drive faster all together it is actually safer than driving slow.
USA Congress ruled that states were free to create their own speed limits. 31 states immediately raised their speed limits to more than 70 mph. 29 of these states had an immediate rate of decline for deaths and injuries related to car accidents.(I am not saying that anyone should drive fast, I don't drive above 100 km/h under any circumstance).
There is this excellent thread on this forum where members discuss the cons of driving at slow speeds.
https://www.team-bhp.com/forum/road-...vers-rise.html (UK: Accidents caused by slow drivers on the rise)
We strive to drive safe and be better at it, this also includes not to perturbate others by over speeding or being a Sunday driver.