A Caxton road was closed after a serious crash in both directions.
The police are at the scene between Great Gransden and Caxton after the crash around 8 in the morning.
The road was blocked in both directions, and the police ordered the drivers to avoid the area.
Two people were seriously injured in the crash.
The police said in a tweet that "they are currently dealing with a serious traffic collision on Caxton Road between Great Gransden and Caxton and have to close the road in both directions.
We'll keep you up to date on this incident and other delays that might affect your route this morning on our live blog.
Delays and cancellations on trains that involve commuters traveling to London and Cambridgeshire are also updated in the blog.
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