Hindura Bollard Hasi

Udupira twometseho ni igisubizo gifatika kandi cyoroshye cyo kugenzura uburyo imodoka zinjira n'uburyo zihagarara.
Izi mpande zombi zagenewe kuzingirwa byoroshye iyo bikenewe, kandi zikazamurwa kugira ngo zibuze imodoka kwinjira mu duce tumwe na tumwe. Zitanga uburyo bwiza bwo kwirinda, korohereza abantu, no kuzigama umwanya.