Сообщение от tiksi

Остальное загадка.

Сообщение от postmitya

Оригинальное описание к фотографиям:
"When the weather turns cold, the track has alot of strain put on it with the contracting steel. Many joints can come apart, as is the case here at MP 269.9 on the CN Dubuque Sub. The 1st real cold snap of 2016 has CN section forces putting many joints back together between Waterloo and Dubuque. Ropes are burning, the rail has expanded, now it's time to get the bars on it, and back in service. Cold weather finds all the weak spots in the railroad. Photo: taken on CN property, by CN employee."