public class RoadWorldGenerator implements IWorldGenerator
{
    @Override
    public void generate(Random random, int chunkX, int chunkZ, World world, IChunkGenerator chunkGenerator, IChunkProvider chunkProvider)
    {
        int blockX = chunkX * 16;
        int blockZ = chunkZ * 16;

        System.out.println("ENTERED ROAD GENERATOR.");

        BlockPos topBlock = world.getTopSolidOrLiquidBlock(new BlockPos(blockX, 90, blockZ));
        world.setBlockState(topBlock, BlockGlass.getStateById(0));
    }

}