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Sidra Intersection (previously called Sidra and aaSidra) is a software package used for intersection (junction) and network capacity, level of service and performance analysis by traffic design, operations and planning professionals. First released in 1984, it has been under continuous development in response to user feedback.〔(【引用サイトリンク】title=''Traffic Signals: Capacity and Timing Analysis'' )〕〔(【引用サイトリンク】title=''Effectiveness Audit of ARRB Intersection Capacity Research'' )〕 A new major version with network modelling capability and new vehicle movement classes was released in April 2013. Sidra Intersection is a micro-analytical traffic evaluation tool that employs lane-by-lane and vehicle drive cycle models.〔(【引用サイトリンク】title=''Modelling procedure 4.0 Drive Cycle Development'' )〕 It can be used to compare alternative treatments of individual intersections and networks of intersections involving signalised intersections (fixed-time/pretimed and actuated),〔(【引用サイトリンク】title=''Capacity Analysis of Traffic Actuated Intersections'' )〕〔(【引用サイトリンク】title=''Fundamental Relationships for Traffic Flows at Signalised Intersections'' )〕 roundabouts (unsignalised),〔(【引用サイトリンク】title= ''Some common and differing aspects of alternative models for roundabout capacity and performance estimation'' )〕〔(【引用サイトリンク】title=''Three-laning a two-lane roundabout - the outcomes'' )〕 roundabouts with metering signals,〔(【引用サイトリンク】title=''Roundabout metering signals: capacity, performance and timing.'' )〕 fully signalised roundabouts, two-way stop and give-way (yield) sign control,〔(【引用サイトリンク】title= ''A Comparison of a Roundabout to Two-Way Stop-Controlled Intersections with Low and High Traffic Volumes'' )〕 all-way (4-way and 3-way) stop sign control, merging, single-point urban interchanges, traditional diamond and diverging diamond interchanges, basic freeway segments,〔(【引用サイトリンク】title=''Fundamental Relationships for Freeway Traffic Flows'' )〕〔(【引用サイトリンク】title='Speed-Flow and Bunching Models for Uninterrupted Flows' )〕 signalised and unsignalised midblock crossings for pedestrians, and merging analysis.〔(【引用サイトリンク】title=''Pedestrian Movement Characteristics at Signalised Intersections'' )〕 Sidra Intersection allows modelling of separate Movement Classes (Light Vehicles, Heavy Vehicles, Buses, Bicycles, Large Trucks, Light Rail/Trams and two User Classes) with different vehicle characteristics. These movements can be allocated to different lanes, lane segments and signal phases; for example for modelling bus priority lanes and signals. In Australia and New Zealand, Sidra Intersection is endorsed by Austroads.〔(【引用サイトリンク】title=''Guide to Traffic Management Part 3: Traffic Studies and Analysis'' )〕〔(【引用サイトリンク】title=''Guide to Road Design Part 4A: Unsignalised and Signalised Intersections'' )〕 In the USA, Sidra Intersection is recognised by the US Highway Capacity Manual,〔(【引用サイトリンク】title=''Highway Capacity Manual 2010'' )〕 TRB/FHWA 2010 Roundabout Guide (NCHRP Report 672)〔(【引用サイトリンク】title=''Roundabouts: An Informational Guide'' )〕〔(【引用サイトリンク】title=''Modern Roundabout Practice in The United States''. ''Synthesis of Highway Practice 264''. )〕 and various local roundabout guides.〔(【引用サイトリンク】title=''Establishing Roundabout Guidelines for a State DOT'' )〕 == Lane-based intersection analysis method == The lane-by-lane capacity and performance analysis method used by Sidra Intersection helps to identify any de facto exclusive lanes, unequal lane utilisation, modelling of short lanes (turn bays, lanes with parking upstream, and loss of a lane at the exit side) and lane blockage in shared lanes including lanes containing opposed (permitted) turns, slip (bypass) lane movements and turns on red. Intersections with up to 8 legs (approaches) can be modelled in detail using this method with advantages over approach-based and lane group based methods.〔(【引用サイトリンク】title=''SIDRA-2 does it lane by lane'' )〕〔(【引用サイトリンク】title=''ARCADY Health Warning: Account for Unequal Lane Usage or risk damaging the Public Purse!'' )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sidra Intersection」の詳細全文を読む スポンサード リンク
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