Districts Impacted
Project Summary
From 2016 to 2020, there were 1,620 crashes within a 20-mile stretch of Route 30 in Jefferson County from Route Y to Old Sugar Creek Road. MoDOT’s plan is to reduce crashes, especially those that result in serious or fatal injuries, at various locations along Route 30 by installing several different types of safety improvements. Some of these improvements will be familiar, such as retroreflective backplates, LED stop signs, and chevrons along curves. However, Traffic calming improvements, such as narrow travel lanes, may look different to most people coming through this area. These improvements are an extension of the $52 million Safety Improvements Project.
Project Milestones
4-6 p.m.
Elks Lodge- Cedar Hill No. 2678
8430 Industrial Dr, Cedar Hill, MO 63016
Improvements such as retroreflective backplates and stop signs with flashing LEDs have been installed, with lane-narrowing pavement marking set to start in 2026.
Project Information
Lane Narrowing on Route 30
From 2016-2020, there were 56 crashes on Route 30 in Jefferson County, from half a mile east of Dittmer Ridge
Road to Diehl Road. Six of those crashes resulted in fatalities or serious injuries. Almost one-third (17) of those
crashes were due to motorists veering off the roadway or veering into the opposite lane.
What does Lane Narrowing mean?
MoDOT proposes lane narrowing along the roadway's curves. The lanes will be narrowed by gradually widening the centerline pavement marking throughout the curved roadway. The 12-foot lanes will be reduced to a 10-foot width, maintaining the MoDOT minimum standard.
This type of improvement is projected to reduce crashes by 49% in this section of the roadway. The goal is to encourage drivers to slow down and pay attention along curves.
What other Safety Improvements are coming to Route 30?
Modified Right Turns
Improves driver-side visibility and discourages high-speed right turns at an intersection by straightening the curve.
New Guardrail
Absorbs the impact and guides the car back onto the road, and prevents vehicles from veering off the roadway
or hitting permanent objects (i.e. signal post, light pole).
Curve Warning Signs
Increases visibility of roadway curves to help drivers navigate the curve safely.
Frequently Asked Questions
Will semi-trucks and farm equipment be able to access the roadway safely?
Larger vehicles and farm equipment will still be able to use the roadway as usual with this new safety improvement. The pavement width will not change, only the pavement markings, so large vehicles can travel off onto the shoulder or into the yellow-striped median, as needed. The purpose of this improvement is to guide drivers to stay within the pavement marking of the narrowed travel lane, slow down, and pay attention along steep curves.
Project Contacts
Jordan Dalaviras
Title
Area Liaison -- Franklin and Jefferson Counties
Department
St. Louis District
Contact Info
Phone: 314-453-5021
Email: jordan.dalaviras@modot.mo.gov
Phone: 314-453-5021
Email: jordan.dalaviras@modot.mo.gov