# What is the peak hour factor?

What is the peak hour factor? ABSTRACT. The Peak Hour Factor (PHF) is used to convert the hourly traffic volume into the flow rate that represents the busiest 15 minutes of the rush hour. Past

## What is the peak hour factor?

ABSTRACT. The Peak Hour Factor (PHF) is used to convert the hourly traffic volume into the flow rate that represents the busiest 15 minutes of the rush hour. Past research indicated that PHF has a strong impact on traffic analysis results.

## What does the peak hour factor tell you?

The Peak Hour Factor (PHF) compares the traffic volume during the busiest 15-minutes of the peak hour with the total volume during the peak hour. It indicates how consistent traffic volume is during the peak hour.

What is peak hour volume?

The peak hour volume is the volume of traffic that uses the approach, lane, or lane group in question during the hour of the day that observes the highest traffic volumes for that intersection. It is simply the ratio of the peak hour volume to four times the peak fifteen-minute volume.

What is the peak hour in traffic?

Rush hour may be 6–10 AM (6:00–10:00) and 3–7 PM (15:00–19:00). Peak traffic periods may vary from country to country, city to city, from region to region, and seasonally. The frequency of public transport service is usually higher in the rush hour, and longer trains or larger vehicles are often used.

### How are peak hour trips calculated?

The peak hour factor (PHF) is found by dividing the peak hour volume by four times the peak 15 minute volume. The actual (design) flow rate can be calculated by dividing the peak hour volume by the PHF, 464/0.86 = 540 pcu/hr, or by multiplying the peak 15 minute volume by four, 4 * 135 = 540 pcu/hr.

The ADT is the volume that results from dividing a traffic count obtained during a given time period by the number of days in that time period. For example, given a traffic count of 52,800 vehicles that was taken over a continuous period of 30 days, the ADT for this count equals 1,760 vehicles (52,800 divided by 30).

How do you calculate PCU per hour?

The actual (design) flow rate can be calculated by dividing the peak hour volume by the PHF, 743.6/0.85 = 879 PCU/hr, or by multiplying the peak 10 minute volume by six, 6 × 146.5 = 879 PCU/hr.

What is PCU traffic?

PCU is defined as ‘the measure of relative interaction between a vehicle and a traffic stream with respect to a standard passenger car under a specified set of roadway and traffic conditions’ (CSIR – Central Road Research Institute, 2017).

#### How do you calculate peak hour?

The peak hour volume is just the sum of the volumes of the six 10 minute intervals within the peak hour (743.6 PCU). The peak 10 minute volume is 146.5 PCU in this case. The peak hour factor (PHF) is found by dividing the peak hour volume by four times the peak 10 minute volume.

#### What time of day has the least traffic?

The Safest Times to Drive As far as times, traffic usually picks up in the U.S. between 9 a.m. and 5 p.m. on weekdays due to work. It’s a good idea to arrive at work around 8:30 a.m. and leave at 4:30 p.m. to avoid not only the traffic but potential danger.

What time of day is traffic the worst?

How to calculate change of rate of volume?

To calculate the Volume Rate-Of-Change indicator divide the volume that has changed over the last n-periods by the amount n-periods ago . Hence, the result is the % that the volume has changed in the last n-periods.

## How do you calculate peak flow rate?

The calculator allows input in either cm or inches, however, inches are transformed in cm that are used in the formula. Peak expiratory flow rate ( PEFR ) is estimated via one of these equations: Children PEFR = ((Height in cm – 100) x 5) + 100. Adult Men = (((Height in m x 5.48) + 1.58) – (Age x 0.041)) x 60.

## What is peak hour traffic?

Peak hour traffic (PHT) is the percentage of Average Daily Traffic (ADT) that occurs during the hour with the highest traffic volume.