出现大量ai双层巴士可能是ailist的原因，OpenOMSI似乎不会区分车组。
简单来说，更为建议的写法可参考Grundorf的写法，OpenOMSI可以读取NormalCars的[aigroup_2]：
引用框:
[aigroup_2]
NormalCars
vehicles\VW_Golf_2\AI_VW_Golf_2.bus 70
vehicles\MB_W123_230E\AI_mb_w123_230e.bus 50
vehicles\MAN_F90\AI_MAN_F90_Wechselbruecke.bus 30
vehicles\MB_W123_230E\AI_mb_w123_230e_cab.bus 10
vehicles\VW_T3\VW_T3_Van.ovh 10
vehicles\VW_T3\VW_T3_Transporter.ovh 10
vehicles\Opel_Manta_B\ai_opel_manta_b.ovh 10
vehicles\Citr_BX\BX.ovh 40
vehicles\MB_T1\ai_mb_t1_kasten.ovh 10
vehicles\MB_T1\ai_mb_t1_rtw.ovh 1
[end]
而不是部分地图的下述写法：
引用框:
[ailist]
0
-1
22
vehicles\MAN_SD200\MAN_SD77.bus
vehicles\MAN_SD200\MAN_SD80.bus
vehicles\MAN_SD200\MAN_SD81.bus
vehicles\MAN_SD200\MAN_SD82.bus
vehicles\MAN_SD200\MAN_SD83.bus
vehicles\MAN_SD200\MAN_SD83_RLB.bus
vehicles\MAN_SD200\MAN_SD84.bus
vehicles\MAN_SD200\MAN_SD85.bus
vehicles\MAN_SD202\MAN_D86.bus
vehicles\MAN_SD202\MAN_D87.bus
vehicles\MAN_SD202\MAN_D88.bus
vehicles\MAN_SD202\MAN_D92.bus
vehicles\MB_W123_230E\AI_mb_w123_230e_cab.bus
vehicles\VW_Golf_2\AI_VW_Golf_2.bus
vehicles\VW_Golf_2\AI_VW_Golf_2.bus
vehicles\VW_Golf_2\AI_VW_Golf_2.bus
vehicles\MB_W123_230E\AI_mb_w123_230e.bus
vehicles\MB_W123_230E\AI_mb_w123_230e.bus
vehicles\MB_W123_230E\AI_mb_w123_230e.bus
vehicles\VW_T3\VW_T3_Van.ovh
vehicles\Opel_Manta_B\ai_opel_manta_b.ovh
vehicles\Citr_BX\BX.ovh
[aigroup]
Busses
12
0
1
2
3
4
5
6
7
8
9
10
11
地图名
使用前者的方式写，个人理解只要你不在NormalCars的[aigroup_2]里加双层车，就不会加载双层车，这个改动对OMSI2原版也是无感的。
至于水泥搅拌车的问题，你可以在上海的ailists.cfg里调低生成率，甚至直接删除NormalCars里的对应ai车。
更多问题或解决方案可在github上提Issues寻求作者或更多开发者的帮助。
English
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