What is the difference between a highway and a freeway?

Highway vs freeway Australia - is there a difference between a freeway and a highway?

Have you ever wondered what’s the difference between highway and freeway? Aren’t the terms kind of interchangeable? The highway abbreviation is HWY but the freeway abbreviation is FWY.

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What is a highway and what is a freeway?

Most big thoroughfare routes are main highways in Australia with a few freeways when they can be accommodated.

It’s best to consider the main point of difference between a freeway and highway as being speed and flow of traffic. One is designed to get you from point A to B but the other is to do it with minimal interruptions and as quickly as possible.

Images sourced from Wikiwands.

Which is why freeways tend to be major developments, on long straight stretches and have dedicated on/off ramps to minimise traffic interruptions.

A main Australian highway is the Hume Highway, which becomes the Hume Motorway after the junction of the M5 and Westlink M7. The entire road stretches 840 kilometres between Sydney and Melbourne.

It starts as a highway at Parramatta Road (Ashfield, NSW) and the first 31km are considered a highway due to the high-density area it travels through, the traffic management systems in place (traffic lights etc) and speeds limits which vary between 50km/h and 70km/h.

When it shifts into the Hume Motorway (or freeway) speed limits increase to 110km/h, local townships are bypassed and there is a minimum of two lanes going in each direction.

The high-flow and high-speed traffic is why a freeway is often called a motorway or expressway. While a high-speed road with more than one lane in each direction sounds just like highway driving, the signage is what makes it obvious which one you’re travelling on.

A freeway has dedicated slipways and on/off ramps to help with the flow of traffic. These divert you off the motorway towards higher-density areas with lower speed limits.

There are always clear markers indicating when you are entering a motorway and when you are exiting one. Often they are toll roads and require a toll to be paid for travelling on them.

Freeway driving has a few different driving rules as well.

You must not stop or park on a motorway, unless in an emergency. For example, to avoid a crash or if you’ve broken down.

When driving on a motorway with a speed limit of more than 80km/h, and two or more lanes, you must not drive in the right lane, unless you are overtaking, avoiding an obstruction, the traffic in each lane is congested or a sign says you can.

You must not make a U-turn or reverse your vehicle on a motorway.

A freeway road sign shows alpha-numeric numbering for significant national and interstate routes. For example, ‘M’ indicates motorways of national significance, for example, the M2 freeway or M5. ‘A’ shows routes of national significance and ‘B’ shows routes of state significance.

Motorway vs highway - do they differ in length?

There isn’t a set kilometre range which separates or defines the two. However, the longest highway in Australia also takes out the top position for the longest national highway in the world (not road). This is the National Highway 1 which runs around the whole of Australia and totals approximately 14,500km in length. What a road trip!

However, the Pan-American Highway is the longest road in the world at 30,000km.

Does Australia tend to have more of one or the other?

Australia definitely has more highways than freeways and sometimes our highways briefly become freeways under the right conditions. It’s a little confusing but Aussie roads can defy belief at times.

Image sourced from World Record Union here.