Overworld Highways

The Overworld Highways are shorter and less frequently used than the Nether Highways. Until October 12th 2019 they were shorter than a few hundred Blocks.

X+ Highway

 * 0-231 Blocks - 2x3 Tunnel at Y=64 (as of 16.10.2019)

X- Highway
The Staircase leads up to the 500 Block Lavacast
 * 0-315 Blocks - 2x3 Tunnel at Y=64 (as of 16.10.2019)
 * 316-351 Blocks - 2-Wide Half Slab Staircase from Y=64 to Y=80 (as of 16.10.2019)
 * 352-375 Blocks - 2-Wide Staricase Block Staircase from Y=80 to Y=104 (as of 16.10.2019)
 * 376-495 Blocks - 2-Wide Full Block Staircase from Y=104 to Y=223 (as of 16.10.2019)
 * 495/496 Blocks - 2-Wide Ladder from Y=223 to Y=242 (as of 16.10.2019)
 * 497-511 Blocks - 2-Wide Sky Highway at Y=242 (as of 16.10.2019)

Z+ Highway
The Z+ Highway was extended from 124 to 4574 Blocks by Sevaii
 * 0-124 Blocks - 2x3 Tunnel at Y=64 (as of 16.10.2019)
 * 125-337 Blocks - 2x3 Tunnel at Y=63 (as of 16.10.2019)
 * 338-2741 Blocks - 2x2 Tunnel at Y=63 (as of 16.10.2019)
 * 2742-4574 Blocks - 2x3 Tunnel at Y=64 (as of 16.10.2019)

Z- Highway
The Z- Highway was extended from a few hundred to 1005 Blocks by Sevaii
 * 0-224 Blocks - 2x3 Tunnel at Y=64 (as of 16.10.2019)
 * 225-311 Blocks - 2x2 Tunnel at Y=64 (as of 16.10.2019)
 * 312-389 Blocks - 2x3 Tunnel at Y=64 (as of 16.10.2019)
 * 390-417 Blocks - 2x2 Tunnel at Y=64 (as of 16.10.2019)
 * 418-496 Blocks - 2x3 Tunnel at Y=64 (as of 16.10.2019)
 * 497-508: 2x2 Tunnel at Y=64 (due to Lavacast at X/Z=+-500, as of 16.10.2019)
 * 509-713: 2x3 Tunnel at Y=64 (as of 16.10.2019)
 * 714-1005: 2x2 Tunnel at Y=64 (as of 16.10.2019)