It comes as authorities confirmed US President Joe Biden and his entourage will be in Edinburgh for the conference with the Queen.
It is understood that Pope Francis, who will not lead the Vatican delegation, can still visit Scotland.
Transport sources said drivers were facing delays of up to 30 minutes on the M8 in Glasgow on November 1 and 2 if world leaders and their international delegations traveled via the motorway to reach the summit.
“This may include around roadworks at the Woodside viaduct between junctions 16 and 17, where the four lanes are reduced to two,” sources told the Scotsman.
“There are security issues with having to move VIPs through slow traffic.”
ScotRail strikes under Cop26 ‘would make Scotland laugh internationally’
Police in Scotland are believed to have gathered specific intelligence on planned protests near junction 19 at Anderston, where VIPs arriving by car will be escorted off the motorway and onto the Clydeside Expressway, which will be reserved exclusively for COP26 traffic during the summit.
Assistant Chief Constable Bernard Higgins said: “Delivering such a complex event as COP26 means that some security barriers and restrictions may be needed in other areas of the country to facilitate the safety and security of world leaders, heads of state, delegates and local residents.
“We will work with partners to minimize local disruption and communicate in advance any roadblocks or diversions that are in place so people can plan their own journeys ahead.”
More than 100 heads of state are expected to attend the conference, which runs from October 31 to November 12, along with representatives from about 200 countries.
Biden and his team of dealers travel to Glasgow’s Scottish Event Campus (SEC) from Edinburgh, where Queen and Pope Francis also plan to stay.
While the queen is expected to use her official residence at Holyrood Palace during the summit, details of where Mr Biden and the pope will be have not been released.
Edinburgh City Council officials urged residents to avoid traveling at peak times during COP26, citing possible disruption caused by world leaders’ safety requirements.
Councilor Adam McVey said: “We have been working closely with key partners including the UK and Scottish Government, Police Scotland, local transport providers and other partners for more than a year and a half to carefully prepare for the COP26 conference.
“While the event hosts Glasgow, we expect it to be busy across the Central Belt, including here in Edinburgh.
“We are soon launching a multi-channel communication campaign that encourages people to plan ahead, consider how and if they need to travel, and to avoid peak times if possible.”
He added: “The campaign aims to raise awareness of COP26 and what it represents, help keep Edinburgh running and open to business, while strengthening and strengthening the national travel campaign launched by the Scottish Government earlier this week. . “
Council Deputy Chair Cammy Day said: “In the run-up to and during the conference, we will work with partners to share the most up-to-date travel and other information across a range of channels, including media, social media and our new website www.netzeroedinburgh.org .
“This is a landmark event for the country and an opportunity for all of us to reflect on our own influence on the world around us.
“In addition to planning any trips ahead, by leaving the car at home and choosing to walk, cycle or use public transport instead, we can each do our part to support the goals of COP26, no matter how small.”
New details of security events in place around the SEC in Glasgow follow the relaunch of Project Servator, a long-running Police Scotland crime and anti-terrorism scheme that will see frontline staff supported by special resources, including police dogs and horses, armed units, CCTV operators and security personnel .
More than 10,000 British officers are expected to arrive in Glasgow in the days leading up to COP26. About 2,500 Scottish officers are receiving additional training in how to handle major protests.
Superintendent Mark Hargreaves, Silver Commander of the Police Operation at the Summit, said: “COP26 is one of the largest police operations the UK has seen and we plan to use all the resources we have available to support the delivery of a safe and secure arrangement.
“Project Servator has proven to be an effective tactic to help disrupt criminal activity and keep people safe and has previously been successfully implemented at major events such as the Commonwealth Games and Edinburgh festivals.”