In the early 20th century, the urban landscape underwent significant changes, leading to the evolution of street signs. One of the most notable milestones in this journey is the 1920s, a decade that saw the introduction of many familiar and enduring street sign designs. Let's delve into the world of 1920 street signs and explore the innovations and influences from this era.

The 1920s marked a period of rapid urban growth and motorization. This increased the need for clear and effective street signage to ensure road safety and navigation. The street signs of this time reflect the Art Deco influences and the nascent days of graphical design, setting the stage for modern wayfinding systems.

The Birth of Standardized Signage
Before the 1920s, street signs were often hand-painted and varied greatly in size, shape, and design from one location to another. The 1920s brought about a significant shift towards standardization. The American Association of State Highway and Transportation Officials (AASHTO) was formed in 1914, which later became a key force behind the standardization of road signs.

In the 1920s, the AASHTO started_OFF advocating for uniformity in road signs. They introduced a series of guidelines that addressed sign material, size, shape, and color. This was a significant departure from the earlier ad-hoc approach and laid the foundation for the consistent signage we see today.
The Introduction of Reflectorized Signs

One of the most notable innovations of the 1920s was the introduction of reflectorized signs. Before this, road signs were prone to fading and damage, especially in harsh weather conditions. The addition of reflective materials made signs visible in low-light and nighttime conditions, improving road safety significantly.
The first major use of reflectorized sign material was in 1928, when the California Highway Commission implemented it on a large scale. This set a precedent for other states, leading to the widespread adoption of reflective materials in the following decades.
The Influence of Art Deco Design

The 1920s was also the decade of Art Deco, an opulent and geometric style that pervaded various aspects of design. Street signs were not immune to this influence. They started featuring sans-serif fonts, bold shapes, and vivid colors, reflecting the stylistic trends of the time.
Some iconic street signs of the 1920s, such as the-directional "One-Way" sign, bear the unmistakable mark of Art Deco design. The use of bold, simple shapes and clear, block letters set these signs apart and made them highly visible and easily comprehended.
The Advent of Traffic Signals and Warning Signs

The 1920s also saw the widespread adoption of traffic signals. Initially introduced in the 1910s, traffic signals became more commonplace in the following decade. This led to the need for additional road signs that could instruct motorists, cyclists, and pedestrians on how to React to these new traffic controls.
Warning signs, too, became more prevalent. They were designed to alert road users to potential hazards or special conditions ahead. These signs featured distinct octagonal shapes and thick, black borders, making them highly visible and recognizable.









Types of Traffic Signals in the 1920s
In the 1920s, traffic signals primarily used red, green, and amber colors to indicate stop (red), go (green), and caution (amber) respectively. These color uses remain unchanged to this day. However, the design of these signals varied greatly, with some featuring multiple lights in one housing and others using separate lights for each color.
The 1920s also saw the introduction of the green-on-top amber-below traffic signal. This design, still used in many places today, was aimed at minimizing confusion as traffic signals evolved from simple stop-and-go controls to more complex systems.
Emergency and Special Condition Signs
As road networks grew and traffic increased, so did the need for signs that could direct road users in emergency situations or alert them to special conditions. Emergency exit signs and yield signs were introduced in the 1920s. These signs were designed to be easily understood, even by drivers who couldn't read the text, typically featuring white text on a blue background and an inverted triangle shape.
Similarly, signs indicating special coding like "No Parking" or "Do Not Enter" were introduced. These signs often featured white text on a red background, making them highly visible and distinct.
In conclusion, the 1920s was a transformative decade for street signs. It brought about standardization, new materials, and innovative designs. While the aesthetics have evolved, many of the principles and designs introduced in this era remain in use today. As we navigate our way through the 21st century, it's fascinating to look back at the roots of modern street signage.