Table 13: Temple Subarea Existing Traffic & Congestion Performance Measures

Table 13: Temple Subarea Existing Traffic & Congestion Performance Measures presents the performance measures for the existing 2015 base year of the KTMPO Model for the Temple MMP Study area. The table is meant to quantify existing traffic and congestion and to provide a baseline for eventual evaluation of future conditions of the Temple Subarea. As the experience of congestion is subjective by region, the congestion described in these metrics are instead in contrast to a non-real free flow network simulation, meaning they are the “existing” or real as modeled conditions.

Table 13: Temple Subarea Existing Traffic & Congestion Performance Measures

Measure 2015 - Existing Conditions*

Interstate Arterials Total

Daily VMT

per person

995,974 1,736,162 2,732,137 28

Daily VHT

per person Annual Weekday Vehicle Hours of Delay

per person

18,876 47,877 66,753 0.68

9,370 15,451 24,821 0.25

Travel Time Index (TTI) 1.06 1.03 1.04 *2015 was used to evaluate current conditions because it is the most recent year available in the KTMPO Model. Source: KTMPO Model

The 2015 “existing conditions,” data in Table 13 shows the average daily VMT per capita is 28 for the Temple Subarea. The KTMPO Model indicates that there are low levels of congestion in the 2015 existing conditions for the Temple Subarea. The reported average annual weekday vehicle hours of delay for the Temple Subarea are equivalent to 15 minutes per person. The TTI indicates slight congestion for 2015 existing conditions, with slightly more congestion occurring on interstate roadways than arterial roadways. The TTI measure suggests trips traveling on the network under congested conditions will take roughly 4% more time compared to the normal free flow travel time for the same trip.

Existing Deficiencies Analysis

The KTMPO Model estimates roadway capacities based on number of lanes, functional classification, and other model inputs. These estimated capacities and the output KTMPO Model volumes were used in evaluating the 2015 roadway system deficiencies of the Temple Subarea. The estimated volumes and capacities were used to calculate a V/C Ratio to generate equivalent LOS values (refer to Travel Demand Model Outputs section regarding LOS methods) and is defined below.

Volume Capacity (V/C) Ratio is the ratio of traffic flow to maximum allowable traffic flow on a roadway segment, where a ratio of 1 represents a segment at full capacity and higher values indicate more severe congestion. This measure is used to isolate specific locations where vehicular demand outstrips capacity of a roadway section.

Table 14 displays Temple Subarea capacity measures. The 2015 average V/C ratio suggests that, on average, the existing roadway network is below capacity and operates at an acceptable LOS. The 2015 average V/C ratio of 0.39 falls within LOS B, which indicates low congestion in the Temple Subarea. Roughly 9% of the total roadway miles within the Temple Subarea are reported as being congested in 2015.