Since 1908, when the Ford Model T was introduced, many improvements have been made to the better automobiles. These days, there are two main areas such as “Connected Vehicles” and “Automated Vehicles” in which rapid technological developments are occurring.
CVs are capable of communicating with each other (Vehicle-to-Vehicle or V2V), with roadside infrastructure, such as traffic control signals (Vehicle-to-Infrastructure or V2I and vice versa), or with other devices, such as mobile phones carried by road users (V2X) .
<Connected Vehicles technology> 
AVs are vehicles where some aspects of a safety-critical control function such as steering, throttle control or braking occurs without direct driver input. They use onboard sensors, cameras, GPS and telecommunications to obtain and analyze information using complex computer algorithms, and respond appropriately by effectuating control in safety-critical situations .
<Autonomous Vehicles technology> 
Difference between CV and AV
The word “Autonomous” means that it is independent or self-sufficient. Therefore, the autonomous vehicles gets information they need by using its own on-board sensors. Also, it operates independently of all other vehicles and infrastructure . By contrast, the connected vehicles gets the information by using a communication technology such as the V2X from other vehicles and roadway infrastructures.
An automated vehicle, which uses sensor-based technologies, can become a fully autonomous vehicle. On the other hand, an automated vehicle, which uses connectivity technologies, cannot become a fully autonomous vehicle. This is because that an automated vehicle using connectivity technologies always need help of other vehicles and infrastructures to get information they need. However, converged technologies, formed from a combination of sensor-based technologies and connectivity technologies, can enhance performances of the automated vehicle and provide advanced solutions to them by covering limitations of the each technologies.
Lastly, connected vehicles need well-made infrastructures and a strong standards among systems, but vehicles using sensor-based technologies do not need that. Therefore, government organizations or international organizations usually lead and deal with connectivity technologies such as connected vehicles, and traditional automakers or private corporations lead and focus on sensor-based technologies to develop autonomous vehicles.
<Difference between CVs and AVs>
A. Somers and K. Weeratunga, “Automated Vehicles: Are we ready?,” Main Roads Western Australia, 2015.
”Connected Vehicle Technology,” [Online]. Available: http://www.its.dot.gov/landing/cv.htm. [Accessed 15 May 2015].
”Bosch develops systems for autonomous vehicles,” 29 January 2013. [Online]. Available: http://www.traffictechnologytoday.com/news.php?NewsID=46132. [Accessed 15 May 2015].