Admin Table of Contents
What is a CD road?
Description. Collector-distributor (C-D) roadways are a supplemental facility between freeway mainlanes and the frontage roads. Their primary purpose is to move the weaving and lane changing away from the high-speed traffic on the freeway mainlanes.
What are collector distributor roads?
A collector‐distributor lane (sometimes referred to as a C‐D lane) is a lane specifically designed to handle entering and exiting traffic along a highway. These lanes are barrier separated from the main highway and provide direct access to local arterial roads and longer acceleration distances to merge onto a highway.
What is auxiliary lane?
An auxiliary lane is defined by AASHTO (5) as the portion of the roadway adjoining the traveled way for speed change, turning, weaving, truck climbing, maneuvering of entering and leaving traffic, and other purposes supplementary to through-traffic movement.
What is the difference between collectors and express?
The Collectors is just the name of the lanes of the 401 Highway that run adjacent to the Express Lanes. The Collectors are used to get off the Express lanes or to get onto the Express lanes. You can also travel the Collector lanes to Markham but normally, the Express lanes are what you would use.
How do you identify a collector road?
A collector road usually consists of a mixture of signaled intersections, roundabouts, traffic circles, or stop signs, often in the form of four-way stops. Two-way stops are generally used at intersections with local streets that favour traffic movement on the collector.
What is the difference between arterial and collector roads?
These arterial roads provide the highest level of mobility and the highest speeds over the longest uninterrupted distance. Interstates nationwide usually have posted speeds between 55 and 75 mi/h. Collectors are major and minor roads that connect local roads and streets with arterials.
What is acceleration lane and deceleration lane?
Deceleration lanes allow traffic exiting a major street to slow down to a safer speed to make a left or right turn at an intersection without affecting the main flow of traffic. Dedicated acceleration lanes allow cars that are joining the main road to speed up to match the flow of traffic.
Who can use express lanes in Chicago?
Permitted vehicles
- All 2 axle passenger vehicles and motorcycles are permitted. Trucks and vanpools with 2 axles are also permitted. Buses aren’t subject to this restriction.
- Non-permitted vehicles on the Express Lanes include any vehicles with greater than 2 axles and vehicles towing trailers or boats.