Online mapping services are among the most invaluable internet apps.

But which of the big mapping services is best? We took a hard look at three of the most popular online mapping sites - Google Maps, MapQuest and the up-and-coming Microsoft Bing Maps - to see which one got us from point A to point B (and points C and D, if necessary) the most smoothly. Here are our findings in six test categories.

The test: ease of use, interface and direction clarity

As the unofficial industry standard, Google Maps is the service - and the interface - that people measure other mapping systems against. In keeping with the design of most Google properties, Google Maps is clean and simple, and the site's home page presents you with a single search box interface.

Bing starts you off with a bit of a puzzling choice: Search for a location in the easy-to-overlook search box, or input both a start address and a destination address in the more obvious sidebar.

MapQuest has the most complicated design of the bunch, requiring you to fill in a four-item form for your first address, and then providing a single box on the results page if you want to get directions from there.

Google Maps does a good job of handling incomplete addresses, business names, and other fuzzy or incomplete information that users may enter, but its directions are a bit Spartan.

Whereas MapQuest includes easy-to-scan icons for turning right or left or merging, Google Maps and Bing offer this information only in text form. Unfortunately, MapQuest's map consumes the entire screen, so you have to scroll down to get the directions - and you can't see both together.

Though Bing is arguably the prettiest service of the three, it has one big failing here: You have to go back to the search page if you want to reverse your route; the other two services let you do reverse direction after results are shown.

Scores: out of 10

Google: 8

Bing: 7

MapQuest: 6

NEXT PAGE: Direction accuracy

  1. Three popular services put to the test
  2. Direction accuracy
  3. Alternate transport methods
  4. The bonus round

Bing, Google Maps, and MapQuest all have their charms, but which one will get you where you need to go with the least hesitation and the most accuracy? We examine all three and pick a winner.

The test: Direction accuracy

None of these services offered perfect directions in every search, and sometimes - no matter which one you pick - you'll get strange routes as a result. Most of the time, the three services agree on the basics of a route, but occasionally one of them varies wildly.

Except when we asked for directions over routes we drive daily, it was impossible to be certain about which map's routes were best, but subjectively Google's results seemed the quickest and most direct, followed by Bing's, and then MapQuest's; in a few cases we tested, MapQuest offered some unmistakably quirky driving suggestions.

We did appreciate the Avoid button that MapQuest places next to every turn, giving you the opportunity to bypass problem intersections that the service may not know about, without your having to specify an alternate route. (All three services let you do this by dragging a point on the suggested route to another street, at which point the service recalculates the route in real time.)

We also appreciated the helpful hints that Bing embeds in its route instructions, including construction notices and advice along the lines of 'If you reach Main Street, you've gone too far'. For travellers driving in an utterly foreign area, Bing provides the best hand-holding.

But nothing beats Google's biggest advantage here: It almost always gives you choices in the form of a collection of two or three different ways you can go, each involving a similar amount of time spent on the road.

Scores: out of 10

Google: 8

Bing: 7

MapQuest: 6

The test: traffic information

All three services use the same colour scheme when you activate the traffic overlay -ranging from green for no problems to black for 'you're not going anywhere today'. Nevertheless, we noticed some stark differences in how well the three services' traffic outlooks work.

The clear leader here is Google. It has the most comprehensive traffic data (based on number of streets covered) and the clearest presentation of information. Google Maps makes it easy to get a quick look at traffic before you head out of the office for home -and its unique ability to change the overlay from live traffic to projected future traffic based on historical data can be a lifesaver when you have a congested route ahead of you.

The overlay lines showing MapQuest traffic data are difficult to interpret. MapQuest's street coverage is nearly as comprehensive as Google's, but its information is extremely difficult to read: The overlay lines are so wide that you may not be able to tell what street is being highlighted. And since red and green lines can sit side by side, the resulting confusion can pose a serious problem. Even more troublingly, MapQuest's traffic data is sometimes clearly wrong.

Compared to the comprehensive traffic on Google and MapQuest, Bing has a very limited traffic system, which doesn't currently apply to UK maps. In the US, it is restricted to Motorways where traffic data wouldn't show up at all on certain sections of road unless we zoomed in or out - and because Bing's lines are drawn so thinly, traffic can be hard to make out without squinting at the map. (Even figuring out how to turn on the traffic overlay in Bing is tricky; you need to click the traffic light icon in the bottom left corner.) The biggest positive that Bing can claim is its coverage of accident and construction issues: These are clearly noted on the map and are more comprehensive than those of any other service.

Scores: out of 10

Google: 9

Bing: 5

MapQuest: 5

NEXT PAGE: Alternate transport methods

  1. Three popular services put to the test
  2. Direction accuracy
  3. Alternate transport methods
  4. The bonus round

Bing, Google Maps, and MapQuest all have their charms, but which one will get you where you need to go with the least hesitation and the most accuracy? We examine all three and pick a winner.

The test: alternate transport methods

Not driving? Modern mapping services can get you there on foot, by train, or via bicycle. Well, most of them can.

When it comes to alternative transport, Google once again is ahead of the game. Google Maps offers clearly labelled pedestrian, public transit (bus/train/tube), and even bicycle directions; and switching among them when you display a map is easy. Foot and public transit directions are generally spot-on, but bike directions (still in beta) need work, as they often route you far out of your way to get to a street with a bike lane - even if that street is busier than any on the more direct route.

Bing includes public transport directions as an option, but Google's are slightly better because they identify the price of your bus tickets. Bing comes up short on recommendations for walking to a bus stop: A dotted line crosses through buildings instead of guiding you along the best streets to take. Bing's walking-only directions are just as good as Google's, though.

MapQuest offers one set of directions, designed for cars, and nothing else, which reduces its usefulness for people walking, bicycling, or using public transport to something close to nil.

Scores: out of 10

Google: 9

Bing: 7

MapQuest: 1

The test: Street View

In 2007, Google pioneered the Street View system, which lets you see a photo of what your destination will look like when you're staring out your car's window and wondering if you've reached the right place. Three years farther along, Google's Street View has achieved amazing depth of coverage, and though the pictures tend to be grainy, even obscure byways are likely to have full 360-degree imagery associated with them.

The picture is somewhat murkier on MapQuest. Its 360 View service is not currently available in the UK. In the areas where it is available, you can't zoom into photos to get a closer look. Still, it's passable in a pinch and is certainly better than nothing.

Bing Maps' new Streetside service has the best-quality images of all the services, but if you find a street with actual coverage, you're lucky. It hasn't made the UK yet and in the US, Bing has left entire cities unphotographed so far.

Bing's 3D interface is optional. While not immediately practical, it's fun to use. That said, Streetside is an extremely promising project, as is its (optional) 3D interface, which takes you out of the street level and up to a bird's-eye view on command, complete with pan/zoom/rotate functions, to present a fancy CGI rendition of your destination - or of the entire city you're in. It may not be so practical, but it's certainly cool to play with.

Scores: out of 10

Google: 8

MapQuest: 5

Bing: 5

NEXT PAGE: The bonus round

  1. Three popular services put to the test
  2. Direction accuracy
  3. Alternate transport methods
  4. The bonus round

Bing, Google Maps, and MapQuest all have their charms, but which one will get you where you need to go with the least hesitation and the most accuracy? We examine all three and pick a winner.

The bonus round: extras

Here, we look at each mapping service for intangibles that could elevate a service above the competition.

Both Bing and Google Maps link businesses to searches, so when you type in an address, a list of businesses at that location pop up in the left-hand column. Bing's listings are more comprehensive and accurate than Google's, but Google adds user reviews of the business listings directly within its results (Bing doesn't have this feature).

MapQuest doesn't provide business listings, but it does offer the ability to rearrange destinations on a multiple-stop trip (input by the user) to produce the most efficient route.

Scores: out of 10

Google: 5

Bing: 6

MapQuest: 5

Overall scores

Google Maps is our clear winner, winning almost every test category we looked at. But Bing is a strong up-and-comer that will undoubtedly benefit from a larger database over time, especially with its Streetside project. As for MapQuest, its age is definitely showing. We hope that its upcoming new version will pay off and make it a strong contender once again.

Google: 47 (out of 60)

Bing: 37

MapQuest: 28

See also: The 10 most underused features of Google Maps

  1. Three popular services put to the test
  2. Direction accuracy
  3. Alternate transport methods
  4. The bonus round