Speed Analysis
The speed limit on Armour Road is 25 MPH. The 25 MPH speed limit is important for the safety of people walking along Armour Road as well as for drivers of motor vehicles; the faster a motor vehicle is traveling before a crash, the more likely a person walking or biking will be injured or killed. More information about speed and the risk of injury or death is available in this report from the AAA Foundation.
Several speed studies were conducted on Armour Road to determine the speed of motor vehicles after the complete street improvements were completed: two by the NKC Police Department (December 2019-January 2020 and March 2020) and one by the city's engineer (July 2020).
The speed studies from the Police Department measured average speeds of 27 MPH near Fayette and 30 MPH near Knox. These studies, which were conducted over a 24-hour period, also recorded a significant number of drivers exceeding 45 MPH on Armour Road.
Armour Rd & Knox St
|
25
|
30
|
36
|
26-35
|
56%
|
Armour Rd & Fayette St
|
25
|
27
|
31
|
23-32
|
77%
|
The City's engineer conducted a spot speed study between Iron and Knox Streets. The average speed was found to be 29 MPH.
Armour Road (Westbound and Eastbound)
|
25
|
22
|
38
|
29
|
28
|
27
|
32
|
24-34
|
94.80%
|
The City's engineer also analyzed traffic citations issued by the NKC Police Department before and after construction, including both citations for speeding and citations for trucks bypassing the truck route and illegally using Armour Road. Citation data is not a complete indication of driver behavior as many factors go into whether or not a ticket is issued if a driver is pulled over. However, the citations issued corroborate anecdotal evidence that there has been a dramatic reduction in trucks illegally using Armour Road and that drivers are more closely complying with the speed limits as seen in the speed study.
Truck Route
|
10
|
11
|
11
|
21
|
12
|
6
|
71
|
Speeding
|
12
|
7
|
8
|
9
|
12
|
11
|
59
|
Truck Route
|
12
|
5
|
3
|
1
|
1
|
1
|
23
|
Speeding
|
10
|
13
|
3
|
5
|
12
|
2
|
45
|
Crash data
The City's engineer conducted a crash analysis to compare before and after construction crash activity to determine the effectiveness of the Armour Road Complete Street project in improving safety. Before construction began on Armour Road, between January 1, 2018 to May 31, 2019 (seventeen months), there were a total of 101 crashes along Armour Road from Fayette Street to Ozark Street including 20 injury crashes and 81 property damage only crashes. After construction ended, between September 15, 2019 and July 15, 2020 (10 months), there were a total of 56 crashes along Armour Road including 9 injury crashes and 47 property damage only crashes. Injury crashes on Armour Road decreased by about 24% and property damage only crashes decreased by about 1%.
Traffic observations were conducted at two intersections on Armour Road to determine volumes and traffic movements for a typical weekday and typical weekend. Observations included through movements and turning movements for cars, trucks, buses, bicycles on the road, bicycles on the sidewalk, and pedestrians on the sidewalk. 2020 observations, which were conducted in June 2020, were compared to 2019 observations, which were conducted in May 2019.
Traffic observations were completed at Iron Street, in the heart of the Complete Street project, and at Swift Street, outside the area of the Complete Street improvements. Both sets of data are presented here for comparison. In general, the observations found increasing numbers of people riding bicycles and declining numbers of people walking and of motor vehicles, at both Iron Street and at Swift Street.
The charts below show traffic "On Armour;" for "Through Intersection" traffic counts, which include all traffic, including traffic making a turn and through traffic on the intersecting street, please see the full Traffic Observations memo.
Armour & Iron - Weekday
Armour & Iron - Weekend
Armour & Swift - Weekday
Armour & Swift - Weekend
In July 2020, the City's engineer conducted a travel time study along the Armour Road corridor to determine the amount of time required to traverse from Burlington Street to Ozark Street for both the westbound and eastbound movements. Data was collected between 4:30pm to 5:30pm. Previous travel time studies had been conducted in similar manners in May 2017 and October 2019. This data was used to compare to the peak hour travel times.
The chart below includes the travel time measured pre-construction, just after construction was completed but before the traffic signal timing was optimized, and after construction once the traffic signals had been optimized. The table shows that travel times have not varied widely throughout the project. Current measured travel times on Armour Road are approximately 25% shorter than the measured travel times before the Armour Road Complete Street project was implemented. Even if traffic volumes increased to pre-COVID-19 levels, it is expected that travel times would remain in the three to four-minute time range.