**2. The proposed speed controller based on traffic sign recognition**

The proposed speed control system comprises two main modules, an image processing module and a control module. The first module recognizes the speed limit signs before extracting from them, a speed information that will be sent to the control module. An overview of these units is shown in **Figure 3**.

#### **2.1 The image processing module**

This first module aims to recognize the speed limit traffic sign whatever the weather conditions are. **Figure 4** presents the proposed model of the speed limit sign recognition system. This system will perform two important tasks: detecting the sign and then identifying the speed. As it is shown in **Figure 4**, this unit receives an input

**Figure 3.** *The proposed speed control system.*

#### **Figure 4.**

image, performs grayscale transformation before normalization and noise removal. Lastly, each preprocessed image will be fed to a CNN unit for a classification process.
