# Introduction

This chapter describes the process by which the trips that are generated for the full day are translated into specific time-of-day trips. Three time-of-day periods are used in RIVCOM model: AM Peak, PM Peak and Off Peak. The time window for these three periods are given below:

• AM Peak 6:00 AM - 9:00 AM
• PM Peak 3:00 PM - 7:00 PM
• Off Peak 9:00 AM - 3:00 PM & 7:00 PM - 6:00 AM

AM Peak and PM Peak period time windows match exactly with the SCAG Model time periods. The Off Peak period in RIVCOM is made up of the Mid-day period, Evening period and Night period in the SCAG model. The time-of-day distribution of trips (by purpose and market segmentation) in the SCAG 2020 RTP base year (2016) model outputs was used to prepare calibration targets for specifying the time-of day parameters.These factors convey the percentage of trips in each time period and are applied to split daily trip productions and attractions into time period specific trips. The RIVCOM model time-of-day factors are here. tod/time_of_day_factors

## Time-of-day Calibration Summary

The table below shows the summary of the trip time-of-day model calibration. The predicted time-of-day share for each trip segment match exactly with the targets due to the structure of the model, hence only the predicted share for each trip segment is shown.

Trips by Time-of-day and Purpose (row percentages)
Trip Segment AM Share OP Share PM Share
HBW_V0 36.8 27.6 35.6
HBW_ILVI 32.7 30.7 36.6
HBW_ILVS 33.3 30.4 36.3
HBW_IHVI 35.6 27.1 37.4
HBW_IHVS 35.1 27.9 36.9
HBO_V0 16.7 44.9 38.4
HBO_ILVI 27.3 38.5 34.2
HBO_ILVS 22.2 45.4 32.4
HBO_IHVI 26.8 38.8 34.4
HBO_IHVS 23.2 44.0 32.8
HBSC_ALL 45.6 21.3 33.1
HBU_ALL 22.7 52.2 25.1
NHB_ALL 18.1 59.9 22.0
IEEI 19.9 49.3 30.8
IEEI_TRK 15.1 67.3 17.6
CV 8.1 83.0 8.9
SUT 8.1 83.0 8.9
MUT 8.1 83.0 8.9
NHBNR_ALL 18.7 49.9 31.4

The table above has the segment names abbreviated. The full segment name correspondence can be found in the table below.

Segment Abbreviation Segment Name
V0 Zero autos
ILVI Low income insufficient
ILVS Low income sufficient
IHVI High income insufficient
IHVS High income sufficient

Riverside County Model, 2020