US-6 AND ADAMS CENTRAL AVENUE The Nebraska Department of - - PDF document
US-6 AND ADAMS CENTRAL AVENUE The Nebraska Department of Transportation (NDOT) is in the early stages of analysis and design work to improve the intersection at U.S. Highway 6 (US-6) and Adams Central Avenue outside of Hastings. Project Purpose
SIDESWIPE OPPOSING
50%
PERCENT OF CRASHES
45% 40% 35% 30% 25% 20% 15% 10% 5% 0%
STATE OF NEBRASKA (2017) ADAMS CENTRAL (2007 - 2017)
6
NUMBER OF CRASHES
5 4 3 2 1
ADAMS CENTRAL (2007 - 2017)
S I D E S W I P E O P P O S I N G
STATE OF NEBRASKA (2017) ADAMS COUNTY (2017) ADAMS CENTRAL INTERSECTION (2007 - 2017) ADAMS CENTRAL INTERSECTION (2012 - 2017)
100%
PERCENT OF CRASHES
90% 80% 70% 60% 50% 40% 30% 20% 10% 0%
PROPERTY DAMAGE ONLY FATAL + INJURY
15 - 24 25 - 34 35 - 44 45 - 54 55 - 64 65 - 74 75 +
50%
PERCENT OF DRIVERS
45% 40% 35% 30% 25% 20% 15% 10% 5% 0%
STATE OF NEBRASKA (2017) ADAMS CENTRAL (2007 - 2017)
8 51 25 3 52 16
2%
22 113 116 35 139 107 59% 23%
31% 152 116 1% 1,093 1,081
26 27 325 437 34% 1,126 1,081
125 112
35% 32% 24% 147 132 384 109 100 310
45% 64 44
258 262 0% 3 3 124 181 46% 113 89
6 7 17% 91%
500%
89% 42 12 104 22 2 55
TRAFFIC APRIL 2018 TRAFFIC AUGUST 2018 TRAFFIC GROWTH TRAFFIC APRIL 2018 TRAFFIC AUGUST 2018 TRAFFIC GROWTH
Traffic signals can only be installed where necessary. The U.S. Department of Transportation developed a series of nine warrants to be used to determine if a traffic signal is needed. At least one warrant must be met before a signal can be installed. Installing a traffic signal where it is not needed can actually make an intersection less safe, which is why this review process is important.
Looks at whether or not there is currently excessive delays in traffic over 8 hours of an average day.
Looks at whether or not there is currently excessive delays in traffic over 4 hours of an average day.
Looks at whether or not there is currently excessive delays in traffic around complexes that see large peaks in traffic such as stadiums and industrial complexes.
Looks to see if large numbers of pedestrians are experiencing excessive delays.
Looks to see if large numbers of students are experiencing delays crossing a roadway while walking or biking.
Pertains to areas with a series of multiple signals at major intersections.
Pertains to intersections with 5 or more crashes in a year (of types susceptible to correction by a traffic signal) and traffic volume thresholds.
Pertains to areas coordinating and organizing traffic flow on an entire network.
Pertains to areas near an at-grade railroad crossing.
NOT SATISFIED 3(A) + 2(B) 280(A) + 420(B) 84(A) + 42(B) Condition Satisfied? Required values reach for? Criteria - Major street (vehicles/hr) Criteria - Minor street (vehicles/hr)
CONDITION A CONDITION B CONDITION A+B
EIGHT HOUR VEHICULAR VOLUME NOT SATISFIED 3 HRS 350 105 NOT SATISFIED 1 HR 525 53
FOUR HOUR VEHICULAR VOLUME Condition Satisfied? Required values reach for? Criteria NOT SATISFIED 3 HRS SEE FIGURE
Warrants that applied to the US-6 & Adams Central Avenue intersection project were analyzed with the following results.
MINOR STREET VOLUME (HIGH APPROACH ONLY) MAJOR STREET VOLUME (TOTAL OF BOTH APPROACHES)
WARRANT 2 THRESHOLD INTERSECTION VOLUMES
MINOR STREET VOLUME (HIGH APPROACH ONLY) MAJOR STREET VOLUME (TOTAL OF BOTH APPROACHES)
Condition Satisfied? Correctable Reported Crashes in last 5 yrs Total Reported Crashes in last 5 yrs Criteria
CRASH EXPERIENCE OF TYPES SUSCEPTIBLE BY A TRAFFIC SIGNAL
Condition Satisfied? Required values reach for? Criteria - Total Approach Volume (vehicle-hours) Criteria - Minor St High Side (vehicles/hr)
Criteria - Minor St High Side Delay (vehicles/hr)
WARRANT 3
CONDITION A CONDITION B
PEAK HOUR VEHICULAR VOLUME NOT SATISFIED 0 HRS SEE FIGURE BELOW
Warrants that applied to the US-6 & Adams Central Avenue intersection project were analyzed with the following results.
NOT SATISFIED 3 16 5 crashes/ 1 yr
NOT SATISFIED
0 Total, 0 minor, 0 delay
800 100 4
1,000 500 1000 1500 900 800 700 600 500 400 300 200 100
WARRANT 3 THRESHOLD INTERSECTION VOLUMES
ALTERNATIVES OFFSET RIGHT TURN RCUT ROUNDABOUT 1 2 3 1 2 4 3 1 1 3 1 2 OPERATIONS SAFETY ROW SCHEDULE
4 3 2 COST
Potential impacts to a variety of environmental resources will be evaluated during the study process. We welcome your input:
The National Environmental Policy Act (NEPA) requires us to complete a Categorical Exclusion to document the impacts a transportation project may have on the human and natural environment. We will review Section 4(f) and 6(f); endangered species and their habitats; hazardous materials and wetlands. Through this process, we will coordinate and document public and agency input on the proposal, alternatives, impacts, and mitigation. In addition to the public, the US Army Corps of Engineers, US Fish and Wildlife Service, Native American Tribes, Nebraska Game & Park Commission, conservation groups, local governments, and many others will be engaged in the study process.
There is no feasible and prudent avoidance alternative to the use of that land; and the action includes all possible planning to minimize harm to the property resulting from such use;
The Administration determines that the use of the property will have a de minimis impact. For this study, Section 4(f) could be applied to resources such as:
The process of determining potential impacts to Section 4(f) resources is typically conducted in tandem with reviews for cultural resources. The study process to determine potential impacts along with the evaluation of possible avoidance options will be summarized in the CE.
Section 4(f) requirements stipulate that the Federal Highway Administration and other DOT agencies cannot approve the use of land from publicly owned parks, recreational areas, wildlife and waterfowl refuges, or public and private historical sites unless the following conditions apply: