A new API lets you show up to three alternative routes on Bing Maps. The new routing engine is called Customizable Route Planning. Also the team announced a brand new algorithm for computing driving-direction queries, include reduced latency and higher performance.
Learn more at Bing Maps New Routing Engine.
If you’re really hardcore, you can read the full paper on the Microsoft Research web site.
Bruce D. Kyle
ISV Architect Evangelist | Microsoft Corporation