## 2 Material and Methods
### Design Selection and Philosophy
#### 2.1.3 Analysis of Related Products  
On the basis of the user needs analysis and in order to clarify the characteristics that the products should have, we selected nine representative products of the same type in the existing market for in-depth analysis. In selecting the nine products of the same type for evaluation, we first took into account the mainstream types circulating in the market, including traditional and modern designs, in order to ensure the wide applicability and universality of the evaluation results. Secondly, special attention was paid to the functionality of the products in the selection process by assessing their warning effect, visibility, and performance under variable environmental conditions [16; 33], thus ensuring that the selected products are comparable in terms of functionality. At the same time, we focused on the harmonization of the products with the urban environment, selecting products with varying performances in terms of environmental integration in order to explore how the design affects the harmony of the barriers with their surroundings [34]. Finally, regarding safety, we selected products with different safety performances in actual use based on historical safety data to analyze the association between design features and safety [35]. As shown in Table 1, by conducting detailed functional, environmental harmony, and safety assessments of these products, we aim to reveal their performance in real-world applications and identify potential shortcomings in accident prevention. \begin{table}
\begin{tabular}{c c c} \hline \hline
**Roadblock Name** & **Advantages** & **Disadvantages** & **Roadblock Picture** \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Analysis of the existing barricade designs, summarizing the advantages and disadvantages of existing roadblocks (the graphics are from [[https://www.baidu.com](https://www.baidu.com)]([https://www.baidu.com](https://www.baidu.com)) (accessed on 10 October 2023)). \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Roadblock Name** & **Advantages** & **Disadvantages** & **Roadblock Picture** \\ \hline A folding barricade & Easy to carry and store, can be quickly reconfigured & Limited interactivity and warning functions & Limited interactivity and warning functions \\ Mobile barrier & Can be quickly moved and redeployed & Insufficient visibility at night without additional lighting & \\ \multirow{2}{*}{Solar roadblock} & Powered by solar panels, often equipped with LED lights & May be less visible in poor lighting conditions if the solar panel is obscured \\ \multirow{2}{*}{Automatic inflatable barricades} & Rapid deployment and easy & Aesthetics may be limited and may require maintenance to ensure proper inflation and deflation \\ \multirow{2}{*}{Automatic inflatable barricades} & Rapid deployment and easy & Assthetics may be limited and may require maintenance to ensure proper inflation and deflation \\ \multirow{2}{*}{Automatic inflatable barricades} & Rapid deployment and easy & Similar to guardrails, may not provide sufficient visual warnings \\ \multirow{2}{*}{Automatic inflatable barricades} & Rapid deployment and easy & Similar to guardrails, may not provide sufficient visual warnings \\ \multirow{2}{*}{Automatic inflatable barricades} & Can be temporarily set up around emergency repair areas & May not be effective if drivers have their windows up or are otherwise unable to hear the alarm \\ \multirow{2}{*}{Guardrail barrier} & Equipped with an audible alarm device to alert drivers & May not be effective if drivers have their windows up or are otherwise unable to hear the alarm \\ \multirow{2}{*}{Eco-friendly material barrier} & Made of recycled or & May not be as durable or visible as other materials \\ \multirow{2}{*}{Eco-friendly material barrier} &
\begin{tabular}{c} Made of recycled or \\ biodegradable materials \\ \end{tabular} & May not be as durable or visible as other materials \\ \hline \hline \end{tabular}
\end{table}