The Roman Empire’s Roads In Transit Map Form
View the high resolution version of the map by clicking here.
Unless you’re a historian or map buff, interpreting a map of the Roman Empire can be a daunting exercise. Place names are unfamiliar and roads meander across the landscape making it difficult to see the connections between specific cities and towns.
Today’s visualization, by Sasha Trubetskoy, has mashed-up two enduring obsessions – transit maps and Ancient Rome – to help us understand the connection between Rome and its sprawling empire.
At the height of the Roman Empire, there were approximately 250,000 miles (400,000 km) of roads, stretching from Northern England to Egypt and beyond. This impressive network is what allowed Rome to exercise control and communicate effectively over such a large territory.
For a detailed look at travel times and costs, check out Stanford’s amazing ORBIS platform. The screenshot below shows the fastest, cheapest, and shortest routes between the settlement of Lutetia (the predecessor of present-day Paris) and Roma.
There were three main types of roads in Ancient Rome:
Viae publicae: Public highways or main roads, typically maintained by the military. These were the main, paved arteries of the empire and often included infrastructure such as drainage, milestones, and way stations.
Viae privatae: Private or country roads were financed by wealthy individuals to connect towns and other noteworthy points to the viae publicae.
Viae vicinales: These tertiary (often dirt) roads connected villages and areas within districts, eventually linking to the larger network.
This network of roads was vital as it allowed for quick troop movement as well as the development of a mail system. As the first major road network in Europe, the Romans quite literally laid the foundation for development across the continent.
There’s something alluring about Rome’s ability to carve out such a huge and advanced empire, with a legacy that lasts today.
– Sasha Trubetskoy
The Enduring Influence of Roman Roads
London, Paris, Barcelona, and countless other major cities sprang from Roman settlements along the road network, and even as Europe descended into the Dark Ages (476-800 CE), Roman roads remained as one of few functioning modes of movement and communication. A recent study even points out that proximity to that foundational network of roads even has a strong correlation with economic activity today.
Beyond mere curiosity or entertainment, looking back at Roman ingenuity allows us to see the impact their road network had on today’s world. That enduring influence is one of the reasons ancient Rome still fascinates us to this day.
For more reading, check out Trubetskoy’s followup, Roman Roads of Britain.
Every Mission to Mars in One Visualization
This graphic shows a timeline of every mission to Mars since 1960, highlighting which ones have been successful and which ones haven’t.
Timeline: A Historical Look at Every Mission to Mars
Within our Solar System, Mars is one of the most similar planets to Earth—both have rocky landscapes, solid outer crusts, and cores made of molten rock.
Because of its similarities to Earth and proximity, humanity has been fascinated by Mars for centuries. In fact, it’s one of the most explored objects in our Solar System.
But just how many missions to Mars have we embarked on, and which of these journeys have been successful? This graphic by Jonathan Letourneau shows a timeline of every mission to Mars since 1960 using NASA’s historical data.
A Timeline of Mars Explorations
According to a historical log from NASA, there have been 48 missions to Mars over the last 60 years. Here’s a breakdown of each mission, and whether or not they were successful:
|1||1960||Korabl 4||USSR (flyby)||Failure|
|2||1960||Korabl 5||USSR (flyby)||Failure|
|3||1962||Korabl 11||USSR (flyby)||Failure|
|4||1962||Mars 1||USSR (flyby)||Failure|
|5||1962||Korabl 13||USSR (flyby)||Failure|
|6||1964||Mariner 3||US (flyby)||Failure|
|7||1964||Mariner 4||US (flyby)||Success|
|8||1964||Zond 2||USSR (flyby)||Failure|
|11||1969||Mariner 6||US (flyby)||Success|
|12||1969||Mariner 7||US (flyby)||Success|
|15||1971||Mars 2 Orbiter/Lander||USSR||Failure|
|16||1971||Mars 3 Orbiter/Lander||USSR||Success/Failure|
|20||1973||Mars 6 Orbiter/Lander||USSR||Success/Failure|
|21||1973||Mars 7 Lander||USSR||Failure|
|22||1975||Viking 1 Orbiter/Lander||US||Success|
|23||1975||Viking 2 Orbiter/Lander||US||Success|
|24||1988||Phobos 1 Orbiter||USSR||Failure|
|25||1988||Phobos 2 Orbiter/Lander||USSR||Failure|
|27||1996||Mars Global Surveyor||US||Success|
|31||1998||Mars Climate Orbiter||US||Failure|
|32||1999||Mars Polar Lander||US||Failure|
|33||1999||Deep Space 2 Probes (2)||US||Failure|
|35||2003||Mars Express Orbiter/Beagle 2 Lander||ESA||Success/Failure|
|36||2003||Mars Exploration Rover - Spirit||US||Success|
|37||2003||Mars Exploration Rover - Opportunity||US||Success|
|38||2005||Mars Reconnaissance Orbiter||US||Success|
|39||2007||Phoenix Mars Lander||US||Success|
|40||2011||Mars Science Laboratory||US||Success|
|42||2013||Mars Atmosphere and Volatile Evolution||US||Success|
|43||2013||Mars Orbiter Mission (MOM)||India||Success|
|44||2016||ExoMars Orbiter/Schiaparelli EDL Demo Lander||ESA/Russia||Success/Failure|
|45||2018||Mars InSight Lander||US||Success|
|47||2020||Tianwen-1 Orbiter/Zhurong Rover||China||Success|
|48||2020||Mars 2020 Perseverance Rover||US||Success|
The first mission to Mars was attempted by the Soviets in 1960, with the launch of Korabl 4, also known as Mars 1960A.
As the table above shows, the voyage was unsuccessful. The spacecraft made it 120 km into the air, but its third-stage pumps didn’t generate enough momentum for it to stay in Earth’s orbit.
For the next few years, several more unsuccessful Mars missions were attempted by the USSR and then NASA. Then, in 1964, history was made when NASA launched the Mariner 4 and completed the first-ever successful trip to Mars.
The Mariner 4 didn’t actually land on the planet, but the spacecraft flew by Mars and was able to capture photos, which gave us an up-close glimpse at the planet’s rocky surface.
Then on July 20, 1976, NASA made history again when its spacecraft called Viking 1 touched down on Mars’ surface, making it the first space agency to complete a successful Mars landing. Viking 1 captured panoramic images of the planet’s terrain, and also enabled scientists to monitor the planet’s weather.
Vacation to Mars, Anyone?
To date, all Mars landings have been done without crews, but NASA is planning to send humans to Mars by the late 2030s.
And it’s not just government agencies that are planning missions to Mars—a number of private companies are getting involved, too. Elon Musk’s aerospace company SpaceX has a long-term plan to build an entire city on Mars.
Two other aerospace startups, Impulse and Relativity, also announced an unmanned joint mission to Mars in July 2022, with hopes it could be ready as soon as 2024.
As more players are added to the mix, the pressure is on to be the first company or agency to truly make it to Mars. If (or when) we reach that point, what’s next is anyone’s guess.
Brand Loyalty is Declining for Most Luxury Automakers
Brand loyalty has declined for most luxury automakers, but three brands—Tesla, Maserati, and Genesis—appear to have bucked the trend.
Brand Loyalty is Declining for Most Luxury Automakers
New research conducted by S&P Global Mobility has found that brand loyalty—measured as the percentage of buyers that go back to the same brand for their next vehicle—is falling across the luxury segment.
In this infographic, we’ve visualized the results of this research, which spans from January 2020 to April 2022.
Brand Loyalty Losers
The following brands have all experienced a drop in brand loyalty over the time period.
For additional context, we’ve also included each brand’s score in the J.D. Power 2022 Initial Quality Study. This is measured based on the number of problems experienced per 100 vehicles (PP100) in the first 90 days of ownership.
|Brand||Percentage Point Change|
in Brand Loyalty
|🇬🇧 Land Rover||-9.2||193|
|🇮🇹 Alfa Romeo||-6.6||211|
Land Rover experienced the biggest drop in loyalty, despite a better than average PP100 rating. One potential reason is timing—the brand’s premier model, the Range Rover, has been in its fourth generation since 2012. The SUV has become relatively dated, though a new fifth generation was recently revealed for the 2022 model year.
Two Volkswagen Group brands, Audi and Porsche, also fared poorly in terms of loyalty. This is somewhat surprising, as both brands offer a portfolio of both gasoline and electric models. Many competitors, such as Acura, Lexus, and Maserati, have yet to release an EV.
Brand Loyalty Winners
Three brands have managed to buck the trend, as shown below.
|Brand||Percentage Point Change|
in Brand Loyalty
We can draw parallels between Tesla and Apple, in that both have incredibly loyal followers.
For instance, between March 2021 to April 2022, 62% of buyers/households who returned to market and previously owned a Model 3 purchased a new Tesla. That’s an impressive statistic, especially when we consider Tesla’s history of build quality issues.
Maserati appears to be in the same boat. The Italian automaker has strengthened its brand loyalty by 4.3 percentage points, despite having the luxury segment’s worst PP100. Perhaps build quality matters less than we think.
Another Factor to Consider
Ongoing supply chain issues could also be contributing to wide-spread declines in loyalty. Rather than waiting several months (or in the case of EVs, years), buyers may switch to a different brand that has cars in stock.
We are still monitoring it week to week, but up to now basically worldwide, we had no issues running production.
– Joerg Burzer, Mercedes-Benz
Many automakers have reported that their supply issues are diminishing, though new economic challenges have risen. For example, surging inflation has pushed the price of a new car to record highs. Combined with rising interest rates (cost of borrowing), this could negatively impact the demand for new cars.
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