Given the discussion about calculated intergreens etc, has there been any case law involving shorter intergreens?

The only reason I ask this question that the strict rule of law says:

“Vehicular traffic proceeding beyond a stop line in accordance with paragraph (1) to (4) must proceed with due regard to the safety of other road users and subject to any direction given by a constable in uniform, a traffic officer in uniform or a traffic warden or to any other applicable prohibition or restriction”

So while I accept that we have a duty to ensure that our junctions are as safe as possible, the rule of law *appears* to put the onus on the driver as to safe behaviour so far as is possible – obviously all prevailing site conditions considered.

I usually set the limit values to the value suggested by the geometry as whilst I might increase an intergreen based on site observations I am very unlikely to want to reduce one to below the value that national standards recommend.

I usually leave at the default of 5s unless there is something I specifically want to protect, for example a min intergreen on a shuttle bridge. Generally though I agree with Chris – being unnecessarilly restrictive usually results in having to procure new PROMs with it’s attendant costs and delays in making the changes.

We tend to have an intergreen limit 1s below the specified intergreen