clearance time

English edit

Noun edit

clearance time (countable and uncountable, plural clearance times)

The amount of time it takes from the initiation of a process until it is completed.
1. (banking) The amount of time required for a payment to be deposited to an account.
  - 1832, Records and Briefs of the United States Supreme Court, page 7:
    By taking advantage of the clearance time after deposit of a check in one account to clear the account the check is drawn upon, and the continuing rotation of checks from one account to the other, or several different accounts, fictitional balances are caused.
  - 1962 September, (Please provide the book title or journal name), volume 16, number 9, page 22:
    The question of clearance time is important, too, in avoiding overdraft penalties.
  - 1964, Harry S. Sugg, “UI Fund Management and Control”, in Unemployment Insurance Review, page 7:
    Depending on local clearing house practices and distances of Federal Reserve banks from depository banks, average clearance time is generally from 1 to 3 days, and transfers to the Treasury have to b e geared to such variable time factors.
2. (road transport) The amount of time it takes for a pedestrian to reach the other side of a crosswalk.
  - 1971, Manual on Uniform Traffic Control Devices for Streets and Highways, page 340:
    On a street with a median at least 6 feet in width, it may be desirable to allow only enough pedestrian clearance time on a given phase to clear the crossing from the curb to the median.
  - 2009, David R.P. Gibson, Bao Lang, Bo Ling, Uma Venkataraman, James Yang, “Detecting Pedestrians”, in Public Roads, volume 73, number 2, page 3:
    The pedestrian clearance time should be sufficient to allow a pedestrian crossing in the crosswalk who left the curb or shoulder during the WALKING PERSON ( symbolizing WALK ) signal indication to travel at a walking speed of 1.2 m ( 4 ft ) per second, to at least the far side of the traveled way or to a median of sufficient width for pedestians to wait.
  - 2020, Elżbieta Macioszek, ‎ Nan Kang, ‎ Grzegorz Sierpiński, Nodes in Transport Networks – Research, Data Analysis and Modelling, page 143:
    However, as for crossing speed recommendation, taking clearance time into account, it is an important stipulation that the duration of a green light should guarantee pedestrians can cross at least half of the crosswalk [10].
3. (aviation) The amount of time from when a pilot requests the right to land at an airport and the tower allows the pilot to land.
  - 1992 April, Howard Fried, “Eye of the Examiner”, in Flying Magazine, volume 119, number 4, page 50:
    And when the pilot asks for an expect further clearance time, he is usually told, "Oh, you can expect your filed route after such and such," the fix to which you have been cleared.
4. (travel, aviation) The amount of time it takes to get through customs.
  - 1988, United States. Congress. House. Committee on Appropriations. Subcommittee on the Treasury, Postal Service, and General Government Appropriations, Treasury, Postal Service, and General Government Appropriations for Fiscal Year 1989, page 132:
    There should be a maximum clearance time of 45 minutes for any passenger on any international arriving flight on any day of the year at any time of the day.
5. (post, business) The amount of time it takes for a backordered item to arrive.
  - 2016, Eleftherios Iakovou, ‎Dionysis Bochtis, ‎Dimitrios Vlachos, Supply Chain Management for Sustainable Food Networks, page 278:
    In the case of the SS strategy or equivalently when there is no emergency supply alternative, expected backorders' clearance time reaches its maximum, exceeding 6 days, while, on the other hand, clearance time is critically lower when an alternative emergency supplier has been proactively contracted.
6. (electricity, electronics) The amount of time from when a fault is detected to when a circuit is automatically reopened.
  - 1995, Electricity Training Association, ‎ Institution of Electrical Engineers, Power System Protection, page 50:
    In Fig. 12.5.6A, for example, a fault occurring at point F is detected by the busbar protection which trips the circuit breaker. It is clear, therefore, that the fault will not be disconnected, except possibly by back-up protection involving a long clearance time.
The amount of time it takes to empty something out.
1. (road transport, automotive) The amount of time to clear a road from traffic after an incident.
  - 1997, Samer Madanat, ‎Ahmed Feroze, Prediction Models for Incident Clearance Time for Borman Expressway, Volume 1, page 15:
    Econometric models have been developed for incident clearance time, which will help freeway incident management agencies to rationalize the deployment of their incident-response resources.
  - 2003, Walter M. Dunn, Safe and Quick Clearance of Traffic Incidents, page 9:
    The study finding will prove useful for any agency or company involved in the direct removal of nonhazardous traffic incidents that seeks legislative or interagency support removal activites or a description of alternative removal strategies to minimize clearance time.
  - 2011, Integrating Business Processes to Improve Travel Time Reliability, page 21:
    On the other hand, WSP measured clearance time based on when all lanes were clear.
2. (road transport, automotive) The amount of time to clear a traffic queue when a signal changes.
  - 2002, Gary Long ·, Clearance Time Requirements at Railroad-preempted Traffic Signals:
    The clearance time of a vehicle starting from within a queue can generally being composed of two time intervals.
  - 2012, Alan Chamberlain, Automation and Robotics in Construction XI, page 58:
    If not so, the signal turns to red without extending green light time for north-bound and clearance time passes.
3. The amount of time to process all the individuals on a waiting list.
  - 2008, Boris Sobolev, ‎Lisa Kuramoto, Analysis of Waiting-Time Data in Health Services Research, page 136:
    In this study, we categorized list size into two groups, with 1 month as the dividing cut-off, reasoning that registration on a wait list with a clearance time of 1 month or less would allow the patient to undergo surgery within the target time (for semiurgent patients) of 6 weeks.
  - 2012, Boris Sobolev, ‎Victor Sanchez, ‎Lisa Kuramoto, Health Care Evaluation Using Computer Simulation, page 238:
    We varied three other patient-level factors that might have affected time to surgery: priority of registration on the surgical wait list, clearance time at time of registration on the wait list, and weekly number of inpatient and emergency procedures [141].
  - 2020, Gavin Mooney, Economics and Australian Health Policy, page 268:
    In 1995 it was found that the clearance time ( the time required to remove all patients from waiting lists if clearance rates remained constant and patients could be treated at any hospital ) for category 1 patients (those for whom admission is desirable within 30 days) was 0.6 months, with 27 per cent of patients waiting over 30 days as at the census date; […]
4. (medicine, pathology) The amount of time for a substance to be eliminated from an body, body part or organ.
  - 1982, R. A. Mansmann, ‎ E. S. McAllister, ‎ Paul W. Pratt, Equine Medicine and Surgery, page 162:
    It should be emphasized, however, that if the drug detection methods are only marginal, the effects of increased doses on clearance time can be quite marked (Fig 4).
  - 2017, S.R. Pandi-Perumal, ‎ Meera Narasimhan, ‎ Milton Kramer, Sleep and Psychosomatic Medicine, page 17:
    The results revealed that sleep infusions in both groups were associated with a statistically significant prolongation of acid clearance time. In minutes, the absolute clearance time was nearly doubled in both groups.
  - 2019, Lars Granath, ‎ William D. McHugh, Systemized Prevention of Oral Disease: Theory and Practice:
    Another factor of interest for dental caries is the individual oral clearance time, i.e., the time it takes for a person to eliminate the food from the mouth without respect to various properties of the food itself.
5. The amount of time it takes to clear a building or other public area in an emergency.
  - 1986, Cecile Grant, ‎ Patrick J. Pagni, Fire Safety Science, page 501:
    Each storey of the building is evacuated on to the stairs in not more than 2.5 min. (This average clearance time was proposed after an evacuation experience during a fire in the Empire Palace Theatre in Edinburgh in 1911;)
  - 2022, Liam Ross, Pyrotechnic Cities: Architecture, Fire-Safety and Standardisation:
    It also established "clearance time" as a regulatory concept.
6. (ecology, chemistry) The amount of time before a foreign substance in the air has dissipated.
  - 1982, David P. Lindroth, ‎Sterling J. Anderson, Safe, Effective Hangup Clearance for Underground Mines, page 11:
    To get a better idea of why the radon concentration takes a long time to return to a steady state, despite the large ventilation capacity of the 16,000-cfm ventilation fans, analysis was made of data from a test conducted to measure clearance time of an inert tracer after sudden injection into the intake portal of the mine .
  - 2004, William A. Burgess, ‎Michael J. Ellenbecker, ‎Robert D. Treitman, Ventilation for Control of the Work Environment, page 191:
    The exhaust configuration has little bearing on clearance time.
  - 2013, Carsten Drebenstedt, ‎ Raj Singhal, Mine Planning and Equipment Selection, page 138:
    Increased airflow is an option to decrease clearance time.
The amount of additional time (clearance) allotted in a situation.
- 2010, William R. Wiener, ‎ Richard L. Welsh, ‎ Bruce B. Blasch, Foundations of Orientation and Mobility, page 394:
  The preferred clearance time will vary, depending on the situation and the person. People may want more clearance time for fast-moving traffic than they do for slow traffic, and cautious people may want a longer clearance time than do high risk takers.