Traffic peak-hour factor
User-supplied measurements and assumptions; One full hour of equal subintervals; PHF=hour count/(intervals per hour×largest interval count).
Civil transport measurement ↗Civil transport measurement calculators
25 calculators. Search or choose one below.
Calculators
Traffic directional split
User-supplied measurements and assumptions; Direction counts must cover the same location and time period.
Civil transport measurement ↗Traffic heavy-vehicle equivalence
User-supplied measurements and assumptions; Sum observed class counts × entered class equivalence factors; no capacity-model default factors.
Civil transport measurement ↗Traffic spot-speed distribution
User-supplied measurements and assumptions; Linear-interpolated sample quantiles and population standard deviation; not speed-limit selection.
Civil transport measurement ↗Traffic travel-time reliability index
User-supplied measurements and assumptions; Planning time index=P95/free-flow; buffer index=(P95−mean)/mean, using linearly interpolated P95.
Civil transport measurement ↗Traffic intersection turning matrix
User-supplied measurements and assumptions; Sum approach-turn matrix and scale observed intersection count by 60/observation minutes.
Civil transport measurement ↗Traffic illustrative Webster green split
Illustrative undersaturated fixed-time calculation; omits minimum pedestrian timings, coordination, saturation changes and implementation safety requirements.
Civil transport measurement ↗Traffic signal pedestrian clearance worksheet
User-supplied measurements and assumptions; Length/supplied walking speed plus supplied buffer; no jurisdictional pedestrian timing selection.
Civil transport measurement ↗Traffic queue storage length
User-supplied measurements and assumptions; Vehicle body lengths plus one clear gap between adjacent stopped vehicles; no probabilistic queue model.
Civil transport measurement ↗Traffic shockwave speed worksheet
User-supplied measurements and assumptions; Kinematic shockwave w=(q2−q1)/(k2−k1), downstream travel positive.
Civil transport measurement ↗Traffic road capacity observation
User-supplied measurements and assumptions; Observed count converted to hourly per-lane rate; observed throughput is not demonstrated road capacity.
Civil transport measurement ↗Road horizontal sightline offset
User-supplied measurements and assumptions; For both endpoints on one circular curve, middle ordinate M=R[1−cos(S/(2R))]; reject arc exceeding semicircle.
Civil transport measurement ↗Road superelevation balance worksheet
User-supplied measurements and assumptions; Small-angle equilibrium e+f=v²/(gR); negative output indicates friction alone exceeds modeled requirement.
Civil transport measurement ↗Road crest-curve sight geometry
User-supplied measurements and assumptions; Crest curve geometry: S=√(2L(√h1+√h2)²/A) for S≤L; otherwise S=L/2+(√h1+√h2)²/A.
Civil transport measurement ↗Road pavement layer quantity
User-supplied measurements and assumptions; Rectangular section volume, density × volume gives material mass; no compaction-loss assumptions.
Civil transport measurement ↗Road asphalt spread-rate audit
User-supplied measurements and assumptions; Thickness=delivered mass/(area×density), assuming all delivered material placed in observed area.
Civil transport measurement ↗Road line marking paint quantity
User-supplied measurements and assumptions; Paint uses area×coats/coverage; beads use one entered application per finished marking area.
Civil transport measurement ↗Road sign support inventory
User-supplied measurements and assumptions; Sign schedule quantities multiplied by supplied support component counts; no wind-load or foundation design.
Civil transport measurement ↗Roadworks lane closure schedule
User-supplied measurements and assumptions; Sweep half-open closure intervals; flag segments where total closed lanes exceeds allowed capacity.
Civil transport measurement ↗Parking snapshot occupancy and turnover
User-supplied measurements and assumptions; Mean and peak snapshot occupancy; unique vehicles/space gives survey turnover, then divide by duration.
Civil transport measurement ↗Parking demand accumulation
User-supplied measurements and assumptions; Boundary occupancy accumulation; arrivals/departures within an interval are netted, so within-interval peaks are not resolved.
Civil transport measurement ↗Bicycle parking rack layout
User-supplied measurements and assumptions; Linear rack positions with envelope width, interposition gaps and two end clearances; no aisle/access standard assumption.
Civil transport measurement ↗Pedestrian flow observation
User-supplied measurements and assumptions; Observed passage count divided by observation time and effective clear width; no level-of-service classification.
Civil transport measurement ↗Traffic count expansion worksheet
User-supplied measurements and assumptions; Multiply observed short count by independently supplied temporal factors; no default traffic calendar or uncertainty inference.
Civil transport measurement ↗Transport discounted benefit-cost ratio
User-supplied measurements and assumptions; Discount supplied year-indexed benefits/costs to year zero; ratio=sum discounted benefits/sum discounted costs.
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