{"type":"road","id":"c-sandbar-flats-out","name":"Sandbar exit","tags":[{"s0":0,"s1":30,"side":"both","tag":"beach"}],"meta":{"status":"live","notes":"Hand-authored M1 track, compiled from Catmull-Rom control points by tools/road/bake.mjs (source: tools/road/tracks/keys-m1.ts). Edit the source and re-bake; never edit these samples by hand."},"network":"keys-m1","from":"j-keys-m1-8","to":"j-keys-m1-8","lengthM":30,"sampleSpacingM":2,"surface":"sand","laneSections":[{"s0":0,"lanes":[{"id":"S1","dCenterM":0,"widthM":5,"direction":1,"kind":"shortcut"}]}],"features":[],"barriers":[],"samples":{"encoding":"json-columns","columns":["x","y","z","kappa","grade","bankRad"],"data":{"x":[2332.6148,2333.9518,2335.2786,2336.5962,2337.9058,2339.2082,2340.5047,2341.7961,2343.0834,2344.3675,2345.649,2346.9288,2348.2074,2349.4853,2350.7629,2352.0404],"y":[1.5,1.5,1.5,1.5,1.5,1.5,1.5,1.5,1.5,1.5,1.5,1.5,1.5,1.5,1.5,1.5],"z":[-4296.8587,-4298.3461,-4299.8427,-4301.3473,-4302.8589,-4304.3767,-4305.8996,-4307.4267,-4308.9574,-4310.4907,-4312.0262,-4313.5632,-4315.1011,-4316.6395,-4318.1783,-4319.7171],"kappa":[-0.003799641,-0.003421174,-0.003047392,-0.00268104,-0.002324963,-0.001982034,-0.001655278,-0.00134783,-0.001062938,-0.0008040391,-0.0005748133,-0.0003786357,-0.0002192023,-0.0001003208,-0.00002590995,-1.0100870000000002e-19],"grade":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"bankRad":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]}},"realName":null,"speedLimitMps":24.6,"provenance":{"origin":"agent","author":"agent","createdAt":"2026-09-30","tool":{"name":"tools/road/bake.mjs","version":"1.1.0"},"sources":[]}}