Complex sentence: At some, such as the more high tech fortress like crossing at the Gaza Strip there are hundreds of people crowding and waiting to get through and others such as at South Jenin are just a truck blocking the road while Palestinians trickle by.
Split into simpler sentences: At some, such as the high-tech fortress like that at the Gaza Strip crossing there are hundreds of people crowded, waiting to get through. At others such as at South Jenin there is just a truck blocking the road while Palestinians trickle by.