About thirty to forty people can cross the bridge at a time. This is because the bridge is made up of cement and iron and hence, it is stronger. Also, the bridge is wider and has enough space to accommodate the given number of people as opposed to the bamboo bridge where only two to three people can cross the bridge at a time. This is mainly because bamboo tends to be less strong than materials like iron and cement. Therefore, to ensure maximum safety, only a few people can cross the bamboo bridge at a time.