Amtrak Keystone 666 was slowing for the restrictive curve at Gap, Pa.
Siemens ACS-64 electrics were fore and aft. White lights forward, red at a rear.
Working with my Nikon Z mirrorless cameras, I exposded this coming and going sequence as the train glided east toward Philadelphia.
![](https://i0.wp.com/briansolomon.com/trackingthelight/wp-content/uploads/2023/12/Amtrak_train_666_lead_locomotive_640_at_Gap_PA_DSC_0303.jpg?resize=474%2C315)
![](https://i0.wp.com/briansolomon.com/trackingthelight/wp-content/uploads/2023/12/Amtrak_train_666_lead_locomotive_640_at_Gap_PA_DSC_0304.jpg?resize=474%2C315)
![](https://i0.wp.com/briansolomon.com/trackingthelight/wp-content/uploads/2023/12/Amtrak_train_666_lead_locomotive_640_at_Gap_PA_DSC_5294.jpg?resize=474%2C278)
![](https://i0.wp.com/briansolomon.com/trackingthelight/wp-content/uploads/2023/12/Amtrak_train_666_rear_locomotive_DSC_5297.jpg?resize=474%2C316)
![](https://i0.wp.com/briansolomon.com/trackingthelight/wp-content/uploads/2023/12/Amtrak_train_666_rear_locomotive_at_Gap_PA_DSC_0307.jpg?resize=474%2C315)
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