With OSRM v5.4.0 we continued our focus on Guidance and improved lane support which was introduced in v5.3.

Some additional highlights:

• Better classification for Roundabout Turns and roundabouts in general
• Improved sliproad detection
• Improved turn penalty function fit to real data
• Support for Lane Access Tags
• Designated HOV Lanes
• Improved Lane Anticipation for subsequent quick lane changes
• Name change detection heuristic reducing the number of instructions
• Eliding instructions for quick turns in Staggered Intersections
• More aggressive instruction collapsing
• Limiting merge instructions to Motorways

Full Changelog