复制步骤将其添加到具有API密钥的iframe中
https://www.google.com/maps/embed/v1/directions?origin=Tyne Tunnel Trade Park, Tyne Tunnel Trading Estate, Unit 3 Narvik Way, North Shields NE29 7DE&destination=Tyne Tunnel Trade Park, Tyne Tunnel Trading Estate, Unit 3 Narvik Way, North Shields NE29 7DE&waypoints=optimize:true|Coxwold Way Billingham TS23 4EA|Aykley Heads Durham DH1 5TS|Crosby Grange Northallerton DL6 3SG&key=YOUR_API_KEY
没有优化路线，而是在True Track软件有限公司添加了另一个航路点，Office 9-10，Cauldon Locks，Shelton New Rd，Stoke-on-Trent ST4 7AB，United Kingdom。
遵循这些步骤将保证以最快的速度解决问题。
考虑为Directions API提交错误报告或打开支持票，让Google调查路线优化行为。