In Australia, road signs are typically manufactured by specialized sign-making companies or suppliers. These companies are responsible for producing road signs that comply with the Australian Standards for road signage, such as AS 1742.2-2019.
The Australian government, through various state and territory road authorities, establishes guidelines and specifications for road signs. These authorities often work closely with accredited sign manufacturers to ensure the production of high-quality signs that meet the required standards for visibility, durability, and compliance.

Here are approximate dimensions for common road sign categories:
(1) Regulatory Signs: Regulatory signs, such as stop signs or speed limit signs, typically range from 24 to 36 inches (60 to 91 cm) in width and height.
(2) Warning Signs: Warning signs, including signs for curves, intersections, or pedestrian crossings, usually have dimensions of approximately 30 to 48 inches (76 to 122 cm) in width and height.
(3) Guide Signs: Guide signs, such as highway exit signs or route markers, can vary in size depending on their location and purpose. They typically range from 24 to 48 inches (60 to 122 cm) in width and height.

There are general guidelines for the height of road signs in Australia.
(1) For vertical signs, such as regulatory signs or warning signs, the height typically ranges from 1.2 meters (around 4 feet) to 1.8 meters (around 6 feet). The specific height within this range depends on factors such as the speed limit of the road, the location of the sign (urban or rural), and the visibility requirements.
(2) For overhead signs, such as gantry signs or guide signs on highways, the clearance height is typically higher to accommodate vehicles passing underneath. The clearance height can range from 4.2 meters (around 14 feet) to 5.5 meters (around 18 feet) or higher, depending on the specific road and bridge clearance requirements.

To create a miniature road sign in CapCut, start by setting custom dimensions for a smaller size. Use CapCut's design tools to add text, symbols, and graphics to represent the road sign's message. Adjust the font size, colors, and placement to ensure readability. Consider the scale and proportion of the elements to maintain clarity. Once satisfied, download the design in the desired file format and print it in a smaller size suitable for a miniature road sign.

The font commonly used on road signs in the United States and many other countries is called Highway Gothic, also known as FHWA Series fonts. Highway Gothic is a specific typeface designed for optimal legibility and readability at various distances and speeds. It is a sans-serif font with clear, bold letterforms and consistent stroke widths. The font's characteristics, such as the width-to-height ratio and spacing, are carefully designed to ensure easy comprehension of the text on road signs, enhancing safety and effective communication for drivers.