COMHAIRLE CONTAE ÁTHA CLIATH THEAS
SOUTH DUBLIN COUNTY COUNCIL

MEETING OF LUCAN AREA COMMITTEE

Tuesday, January 24, 2012

QUESTION NO. 7

QUESTION: Councillor E. Tuffy

Noting the Reply to Question 12 at the October Lucan Area Committee Meeting, to advise the Manager that there is a high level of concern amongst local drivers about the time intervals allocated to the various traffic movements/crossings at the Kennelsfort Road/N4 junction, and to ask the Manager if he will carry out another evaluation of the traffic signal system, and have particular regard to the perceived inadequacy, at many times, of the time to allow traffic to cross the N4, especially traffic coming from Palmerston Village?

REPLY:

Traffic signals are controlled by means of detector loops which detect the presence of vehicles. These extend the green time to any particular movement up to a maximum green time. It is possible that when traffic flows are light and a junction is wide that the signals may change from green before a vehicle has cleared the junction. There is, however, an inter green period before any opposing signal receives a green signal.  It should be noted that a green signal denotes "Proceed if it is safe to do so".  The traffic signals at this location are constantly reviewed and updated as necessary.