<p>A tunnel incident warning system trial in Portugal has concluded successfully with results suggesting the ETSI ITS G5 short-range communication technology has reached a level of maturity sufficient to warrant widespread rollout. The overall aim of the project is to reduce the number of road deaths in Portugal...중략...</p> <p>&nbsp;</p> <p>**<a href="https://www.traffictechnologytoday.com" target="_blank">출처 : https://www.traffictechnologytoday.com (원문보기)</a></p>