Bhrigu Express: बलिया की आन बान और शान , भृगु एक्सप्रेस है तुम्हारा नाम। हर रविवार तुमसे मिलना है मेरा काम। - Shanzil Kabir

It is called intermediate block.
Just like absolute block this is also manually controlled; signal goes from green to red after train passes by, but signal stays red until manually switched to green. This is not so in automatic block, and requires additional circuitry in ABS.
In IBS control for block signal is at rear station.

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