One of the most interesting ideas presented at the competition of student scientific projects held at the Oguzhan Engineering and Technology University (ETU), (http://orient.tm/ru/2019/01/10/21947.html), was the of project soft “speed bumps”, safe for cars and at the same time effective to reduce the speed of transport.
Every driver knows that the “speed bump” is an artificial unevenness, and by crossing it (at high speed) the suspension of the car suffers. Therefore, responsible drivers are trying to gently move obstacles that, in order to ensure traffic safety and limit the speed of motor-transport, are installed in residential areas, at educational institutions, hospitals, pedestrian crossings, etc.
In order to protect the car from premature wear and at the same time make the roads safer for pedestrians, a group of ETU students propose to put into operation “soft” bumps made of non-Newtonian fluid, rubber and steel restraints.
Non-Newtonian fluid is a unique material whose hardness depends on the speed of exposure to it. The more actively and faster it is affected, the harder the material becomes. An example would be the favorite toy “Hand gum” (composed of starch and water) in childhood. It remained liquid while it was alone in a glass. But throw him the gum a swing on the table, as it instantly hardened on impact.
On this principle, the work of the “speed bumps” proposed by ETU students is built. If the car overcomes such a limiter at low speed, it simply bends under the wheels. If the car is racing at full speed, the driver should be ready for a hard hit.
Turkmen students are not pioneers in this field. For the first time, such road speed limiters appeared in Spain with the help of Bennova. However, ETU developed the technology from scratch: experienced a variety of local materials, selected the most effective ones to use, calculated the necessary proportions and consumption.
The cost of the prototype road device without installation costs amounted to 180 manats 80 tenge. This amount includes the purchase of ingredients to create 30 kilograms of non-Newtonian fluid (1 kg – 3 manats), 3 m2 of rubber (1 m2 – 6 manats), two steel rails 3 meters long and 5 cm wide (1 m – 3.8 manats) and additional materials: anchor bolts for fastening the structure to the roadway, paints to highlight the limiter and other things.
Then the students should examine the durability of a soft “speed bump”, a test of temperature and moisture resistance, as well as the calculation of the optimal height of the limiter, which determines how cars should slow down.
– Without these data, it is impossible to calculate the profitability of the project, –Ayjeren Abdurakhmanova, the head of the Department of Innovation Economics at says. – The idea itself is very relevant, but if an artificial obstacle does not withstand the test of temperature fluctuations in Turkmenistan and will require too frequent replacement, then all meaning in its implementation disappears. Therefore, the project requires a more detailed study.
Today, “speed bumps” is a reason for many disputes. Their benefit is beyond doubt. But the fact is that the artificial irregularities that limit the speed of the traffic flow must also correspond to the mass of norms and requirements: to be of a certain height, width and length, provided with special drainage system. And the presence of a barrier should be reported by road signs and the bright coloring of its surface.
On many roads, these requirements are not met, which turns “speed bumps” into real enemies of drivers. Also, in addition to the loose suspension, as a result of braking, driving on an uneven surface and subsequent acceleration, the fuel consumption of the vehicle doubles, which increases the level of emissions to the atmosphere.
With favorable results of the experiment of ETU students, their development will become a compromise between pedestrians, motorists, police and environmentalists.