JP+ Bridges is a bridge replacement NewGRF for OpenTTD. It is comprised of two separate NewGRFs: JP+ Bridges and JP+ Bridges Extension. This is because the Extension set contains extra features that require JGR Patch Pack and are not supported in standard OpenTTD.
Bridges have limited IDs in OpenTTD, meaning the game only supports 13 bridges. JGRPP adds 3 extra IDs, bringing the total to 16. Therefore, JP+ Bridges should not be loaded with any other bridge set, as the sets will override each other depending on load order.
Main Set
00: Wooden Bridge
A generic wooden bridge, suitable for the early years.
01: Stone Arch Viaduct
02: Brick Viaduct
03: Cable Stayed Bridge
04: Suspension Bridge
05: Arch Truss Bridge
06: Tied Arch Bridge
07: Continuous Truss Bridge
08: Steel Truss Bridge
09: Cantilever Truss Bridge
0A: Concrete Viaduct
0B: Wide Urban Elevated
0C: Narrow Urban Elevated
Extension Set
Note: The extension set features different designs depending on whether it’s a road or rail bridge.
See Elevated Station Bridge for instructions on how to build the elevated stations.
0D: Elevated Station Left / Suspended Monorail
0E: Elevated Station Right / Subway Overlap
0F: Steel Trestle / Old Suspension
Based on Tokyo’s Kiyosu Bridge

Credits
Coding: Emperor Jake, with indirect help from Wallyweb and Quast65
Graphics: Emperor Jake, GarryG, andrew350