# Integration and Field Evaluation of an IoV System for Enhancing Road Safety
## 5 Results
### User Acceptance
#### 5.2.2 Results Derived from the Post-Test Questionnaires  
Driver/riders generally consider the system to be reliable (Figure 18) as the large majority tend to evaluate positive features, such as the sharp information received, but there is also a large percentage of neutral evaluation from a segment of the users, without indicating that this factor would be a deterrent for them to use the system. The vast majority of the drivers' intention is to use the system in the future if possible.  
Figure 17: Recorded reactions for the scenario “VMS”.  
An important element for further development of this technological innovation is the evaluation of the workload (driving duty) that the system imposes on the driver. The most demanding actions and therefore with the biggest workload the display of information (eye distraction) and then the requirements placed on the drivers regarding the timely response, as presented in Figure 19.  
In the qualitative evaluation (free text), users singled out valid and timely information, especially on security issues, as advantages of the system; the beautiful design and the nice presentation of the information were noted as particularly positive elements. The absolute majority of the users indicated that they would like more audio warnings as well as more options for connectivity (e.g., via Bluetooth), while some users also mentioned that personalization in the sound would be most welcomed so that they can choose different audio for each case or warning. In addition, the users stated that they would like to have on display the estimated time to an event (e.g., collision time in the case of a crash) when this is for security reasons.  
In total, 95% of users state that they expect the system to provide a positive impact on their daily mobility, but the largest amount (85%) is willing to pay a price of up to \(\upmu\)20 to get it and 15% of users intend to pay more, in the range between 20-50 \(\upmu\). Regarding the importance of the expected effects, the users singled out the enhancement of the penetration of C-ITS systems following other impacts, without, however, giving particular importance to any, as the score is relatively close. The expected impact of the system is presented in Figure 20.  
Figure 19: Subjective workload perceived by the users.  
Figure 18: Usability evaluation of the application.  
From the evaluation of the user acceptance from the side of the road operators, the results are very positive for the particular features that strengthen the acceptance of the system. The respective reliability results for the operators show a big confidence of the users as much for the functionality of the system as well as the provided information. Regarding the market penetration, all road operators would consider themselves as future users of the system and like to use it, while the majority (60%) of them intend to pay for this use. The great majority of these (40% with intensity of nine (9) out of ten (10), 40% with ten (10) out of ten (10) and 20% with seven (7) out of ten (10)) would recommend the system to a colleague. Among the advantages of the system, the majority mention the timely and immediate provision of information about the condition of the road coating, believing that the system can work positively as a complementary application to existing maintenance systems. Among the disadvantages, there is a single reference for the provision of notifications through acoustic messages, while no proposal for a change in the existing form of the application was recorded. In terms of the legal/regulatory/operational barrier, no user stated a barrier to the operation of the system and none foresaw any conflict with other existing or emerging technologies.