Summarizing used technologies in speedometer
In previous sections, strengths and weaknesses of speedometer technologies were discussed in detail with some examples and technical considerations. For the sake of comparison, all the discussed contents are summarized in the table below:
Technical comparison table
It is supposed that there are no defects in terms of implementation in all cases in the above tables. So that only essential intrinsic differences are compared. In other words, it is possible for a system with a low technology level but fine implementation to perform better than the other system with a high technology and poor implementation.
As it can be seen in the above table, each technology has its own performance range which is related to the hardware being added to it. Mono-target radar with photography camera has the most limited range which due to inappropriate hardware and abolished technologies used in it, this kinds of systems are not efficient and do not support minimum key capabilities such as reading plates for all the targets and measuring average speed.
But regardless of abolished technologies and usage of inappropriate hardware, every speedometer system necessarily needs a camera for documentation. So, having the lowest net cost, mono-cam LPR based systems wins the price competition (regardless of company’s profit). But low price does not necessarily ensure the proficiency of price-to-efficiency ratio and in addition to deprivation of many capabilities, there is a high chance of case errors for LPR based systems, which limits the application of them in many projects.
A higher level of efficiency can be achieved through adding radar and stereovision to the system in next step. Obviously, a hybrid system (radar and stereovision combined) will perform better than each system individually. It is worth mentioning that, in terms of technology, all the 3 systems (radar, stereovision and hybrid) are capable of running all LPR mono-cam algorithms consequently speedometer based on LPR is possible for them.
But the efficiency of a system is not only dependent on the used technology, and application of this system requires the employers to recognize the strengths and weaknesses of technologies. Today ITS systems market has grown up in away that GCs or governments consider the highest standard levels for buying poles, network switches, and other equipment. For example some poles with the highest sheet diametric are ordered (which may never be technologically required) or some expensive industrial net switches are used for net equipment. But considering the youthfulness of ITS market and LPR systems, there is not enough experience about this kind of technologies and practically price competition will result in the lowest technology and quality level in LPR cameras section. at last the outcome system will be a caricature of a really strong infrastructure with the speedometer camera as its Achilles heel.