Does Australia use km or mph?

Australia’s Metric System for Road Speed Limits

Australia has adopted the metric system for road speed limits, utilizing kilometers per hour (km/h) since 1974. This standardized approach ensures clear and easily readable signage throughout the country, with all speed limits being multiples of ten.

The metric system provides several advantages for road signage. First, the use of multiples of ten simplifies the display and comprehension of speed limits. Second, it allows for a wider range of speed limits, providing greater flexibility in setting appropriate limits for different road conditions.

The only exception to the rule of using multiples of ten is in South Australia, where some speed limits are set at 105 km/h. This deviation is attributed to the state’s long straight roads, where a slightly higher speed limit is deemed appropriate.

The adoption of the metric system has significantly improved road safety in Australia. The use of familiar units and consistent signage has reduced confusion and made it easier for drivers to comply with speed limits. Studies have shown that the metric system has contributed to a reduction in road fatalities and injuries.

In summary, Australia’s use of the metric system for road speed limits has resulted in clear and standardized signage, enhanced road safety, and increased driver comprehension. The simplicity and consistency of the metric system have played a crucial role in improving Australia’s road infrastructure and promoting safe driving practices.