Traffic Planning

Cycle Tracks - Safety

A cycle track is an exclusive bicycle facility that combines the user experience of a separated path with the on-street infrastructure of a conventional bike lane. Because of dangerous and also care about the safety of the people would using the bicycle track, separate of the bicycle track with the main road was important. Majority the Cycle tracks are separated from vehicle travel lanes, parking lanes and sidewalks. and as the crossing road can be given speed-reducing regulations. Cycle tracks can be either one-way or two-way, on one or both sides of a street, and are separated from vehicles and pedestrians by pavement markings or coloring, bollards, curbs/medians or a combination of these elements.Following is show type of the separation.


Type of cycle separation  :

 Parking Placement

Where on-street parking exists, the cycle track should be placed between the parking and the sidewalk. Drainage inlets should be provided adjacent to the sidewalk curb to facilitate run-off. This technique is common in Copenhagen, as pictured left.





Channelization

Cycle tracks can be at street-level, provided that there is a physical separation. The curb creates the separated space, as well as preventing passengers from opening doors into the cycle track and discouraging pedestrians from walking on the facility.




Mountable Curb

Cycle tracks can be grade-separated from the roadway. The cycle track should be two or three inches above street-level, and the sidewalk should be an additional two to three inches above that. Where cyclists may enter or leave the cycle track, or where motorists cross at a driveway, the curb should be mountable with a small ramp, allowing cyclist turning movements



Bollards and Pavement Markings

In addition to grade separation or channelization, the cycle track should have signage, pavement markings and/or different coloration or texture, to indicate that the facility is provided for bicycle use. Signage, in addition to bollards, can add to the physical separation of the facility, shown in this example from Melbourne, Australia.




Source: http://flickr.com/photos/avlxyz/2270515901/


THE ROAD New LAYOUT

This new means of transport was planned in the Urban Transport Policy. 

(i) reducing the number of road lanes to just one lane per way
(ii) integrating the tramway in a separated lane in the middle of the street or in a mixed-lane with cars when the street was too narrow
(iii) taking bicycles into account by means of cycle lanes or mixed areas.

a bus lane shared with bicycles 

This improvement was carried out on an one-way arterial road. It consisted in
(i) sharing the bus lane with bicycles by widening the bus lane
(ii) creating a cycle lane on the other side of the street
(iii) thus reducing the number of road lanes (3 before improvement, 2 after).


a narrower arterial road with the creation of a cycle lane:

This road was composed of two lanes per way, separated by a central reservation. The road layout consisted in reducing the number of lanes (one per way) and creating a cycle lane on each side.


a narrower distributor road with the creation of a cycle lane :

It’s was a one-way road, comprised of two lanes. The improvement consisted in eliminating a lane to create a cycle lane on the right and widening the pavement on the left.



The division of pavement between pedestrians and bicycles and the implementation of a separated road lane 

The improvement consisted in narrowing the road by creating a central reservation. The goal was to avoid turning movement. Car parking is authorized on the central reservation.
The pavement has been separated for pedestrians and two-wheelers, but not widened.


sources: Association for European Transport and contributors 2008
Marine Millot CETE Méditerranée, France 







TRAFFIC PLANNING & DESIGN 


Road transport harmful effects have to be more and more integrated in urban planning. urban planners may wonder what is the influence of their choices on road safety. Using pedestrian, Public transport and cycle paths is the best way to reduce the accident, many country was implement this way to reduce the traffic congestion and also accidents. not only the accident but also reduce the traffic problem and pollution.

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sources:Traffic Planning and Design, Inc. (TPD) 

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