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has launched a [https://Www.Homeclick.com/search.aspx?search=consultation consultation] on plans to expand 's Ultra Low Emission Zone (Ulez) to cover the entire city - encompassing 3.5million more people - in a bid to tackle the capital's 'toxic air crisis'. <br>The mayor is proposing to extend the scheme's boundary from the North and South Circular Roads to the whole of Greater London from August 29 next year - potentially pricing hundreds of thousands of drivers off the road, experts warned today. <br>Drivers of vehicles which do not comply with minimum emissions standards are charged a daily fee of £12.50 for entering the Ulez.<br>It is the latest phase of Mr Khan's so-called 'war on motorists' in recent years, which has included:<br>Low Traffic Neighbourhoods which shut some roads to through-traffic but resulted in higher local congestion;The Congestion Charge being extended in time as well as cost;Cycle lanes constructed on already-existing roads but resulting in longer journeys for motorists.Analysis by the PA news agency found that more than 3.5 million more people will live within the zone if it is expanded as planned.<br>The mayor's office estimated that an additional 135,000 vehicles would be affected, meaning it could rake in almost £1.7million extra per day.<br>Meanwhile, a Freedom of Information (FOI) report from the AA has found that the proposed scheme could see a third of drivers priced off the road due to its daily charges.<br>While the consultation admits that 18 per cent of vehicles will be hit by the charges, information released by Transport for London points to a 34 per cent impact on London car owners in some areas. <br>The motor breakdown and insurance agency llc ([https://www.adpost.com/us/business_products_services/846118/?session_key=b70f7a20630c78199bdaa64ed6cdeaa1 similar internet page]) firm blasted the mayor's proposals for hitting poorest families the hardest, at a time when they will 'hopefully' be seeing the end of the cost-of-living crisis.  <br>It comes after the introduction of the much-hated Low Traffic Neighbourhoods (LTNs), which closed some roads to through-traffic to try to reduce pollution on residential streets. <br>A raft of LTNs in London were scrapped last year after they were found to increase local congestion and caused 'no material change in air quality'.<br>Mr Khan has also angered London's drivers in recent years with policies such as the extension in both time and price of the Congestion Charge, while cycle lanes have also proved deeply unpopular with motorists for causing longer journey times.<br>In launching its latest consultation, conducted by Transport for London (TfL), Mayor Khan's office warned that the capital is suffering a 'toxic air crisis', with around 4,000 premature deaths in 2019 attributed to filthy air.<br>              London Mayor Sadiq Khan has plotted for the Ultra Low Emission Zone to grow more than four times its current size, stretching from Heathrow airport to Upminster and Enfield to Biggin Hill, from the end of 2023 <br>        Sadiq Khan (pictured) is proposing to extend the Ulez scheme's boundary from the North and South Circular Roads to the whole of Greater London from August 29 next year<br>The boroughs of Barnet, Bromley, Croydon and Havering had the most deaths, demonstrating that poor air quality 'is not just a central London problem', according to Mr Khan's office.<br>Whether or not a vehicle is liable for the Ulez charge depends on how much nitrogen dioxide (NO2) it emits.<br>NO2 damages lungs and can exacerbate existing conditions such as asthma and lung and [https://dict.leo.org/?search=heart%20disease heart disease].<br>For diesel cars to avoid the charge they must generally have been registered after September 2015, while most petrol models registered from 2005 are exempt.<br>Jack Cousens, the AA's head of roads policy said: 'The original ULEZ impacted on 300,000 car-owning London residents, the vast majority coming from low-income backgrounds without the ability to afford a replacement vehicle. <br>'This expansion of the zone will price hundreds of thousands more off the road.' <br>He added: 'These drivers and their families will, hopefully, be starting to recover from the cost of living crisis in August of next year.<br><br>The London Mayor wants to hit them with a charge or a car-replacement cost that they will never be able to afford.<br>  RELATED ARTICLES              <br><br><br><br>Share this article<br>Share<br><br><br>'The AA believes that far more can be done in lowering London's emissions by an expansion of Park & Ride and Park & Cycle facilities on the city's outskirts. <br>'That benefit would remove the emissions from huge numbers of cars (Cambridge converts 3.6 million inner-city car journeys into bus trips this way each year) long after the ULEZ becomes defunct.<br>'With pump prices so high, it calculates that there is little difference in cost to driving from outside into inner London than taking public transport.<br><br>By train or underground, the journey time is halved, which makes Park and Ride a no-brainer.'<br>Mr Khan previously ruled out introducing a Clean Air Charge, which would have affected drivers of all but the cleanest vehicles.<br>        Drivers of vehicles which do not comply with minimum emissions standards are charged a daily fee of £12.50 for entering the Ulez<br>He also decided not to go ahead with a proposal to charge drivers of vehicles registered outside London for entering the capital.<br><div class="art-ins mol-factbox floatRHS news" data-version="2" id="mol-09c13ad0-d804-11ec-a4d0-e103c3981ca6" website Khan plans to expand London&apos;s Ultra Low Emission Zone
 
<big>[http://ovsa.njit.edu/ EOVSA] (Expanded Owens Valley Solar Array) is a new solar-dedicated radio interferometer operated by the New Jersey Institute of Technology. This wiki serves as the site for EOVSA documentation. </big>
 
== EOVSA Documentation ==
 
* <big>General</big>
** [[Downconversion and Frequency Tuning]]
** [[Dealing with Radio Frequency Interference]]
** [[Switching between 200 MHz and 300 MHz Correlator]]
 
* <big>Computer-Network</big>
** [[Computing Systems]]
** [[Network]]
 
* <big>Control System</big>
** [[27-m Antenna Commands]]
** [[Schedule Commands]]
** [[Control Commands]]
** [[Attenuation and Level Control]]
 
* <big>Hardware</big>
** [[Hardware Overview]]
** [[2.1-m Antennas]]
** [[27-m Antennas]]
 
* <big>System Software</big>
** [[Calibration Database]]
** [[Stateframe Database]]
** [[Database Maintenance]]
** [[Create CASA measurement sets]]
 
* <big>Calibration</big>
**[[Calibration Overview]]
**[[Pointing Calibration]]
**[[Total Power Calibration]]
**[[System Gain Calibration]]
**[[Antenna Position]] (Baseline Calibration)
**[[Reference Gain Calibration]]
**[[Daily Gain Calibration]]
**[[Delay Calibration]]
**[[Bandpass Calibration]]
**[[Polarization Calibration]]
**[[Calibrator Survey]]
**[[Practical Calibration Tutorial]]
 
* <big>[[Starburst]]</big>
 
== Using EOVSA Data  ==
* <big>[[EOVSA Data products]]</big>
* <big>Analysis Software</big>
** [https://github.com/suncasa/suncasa SunCASA] A wrapper around [https://casa.nrao.edu/ CASA (the Common Astronomy Software Applications package)] for synthesis imaging and visualizing solar spectral imaging data. CASA is one of the leading software tool for "supporting the data post-processing needs of the next generation of radio astronomical telescopes such as ALMA and VLA", an international effort led by the [https://public.nrao.edu/ National Radio Astronomy Observatory]. The current version of CASA uses Python (2.7) interface. More information about CASA can be found on [https://casa.nrao.edu/ NRAO's CASA website ]. Note, CASA is available ONLY on UNIX-BASED PLATFORMS (and therefore, so is SunCASA).
** [https://github.com/Gelu-Nita/GSFIT GSFIT] A IDL-widget(GUI)-based spectral fitting package called gsfit, which provides a user-friendly display of EOVSA image cubes and an interface to fast fitting codes (via platform-dependent shared-object libraries).  
** [[Spectrogram Software]]
** [[Mapping Software]]
* <big>Data Analysis Guides</big>
** <big>[[EOVSA Data Analysis Tutorial 2022]]</big> at [https://sphere.boulder.swri.edu/ SPHERE 2022 Workshop]
** <big>[https://colab.research.google.com/drive/1lSLLxgOG6b8kgu9Sk6kSKvrViyubnXG6?usp=sharing#scrollTo=xbXyyLmCFCGL EOVSA Data Analysis Tutorial at RHESSI 19 Workshop]</big>
** <big>[[EOVSA Data Analysis Tutorial]]</big> at [http://rhessi18.umn.edu/ RHESSI XVIII Workshop]
** [[Self-Calibrating Flare Data]] Example script and guides for self-calibrating EOVSA flare data (to be completed)
<!-- ** [[Imaging]] -->
<!-- ** [[Flare Imaging]] -->
**[[IDB flare pipeline]] Tutorial to run the flare pipeline for quicklook images
<!-- ** [[Imaging]] -->
<!-- ** [[Flare Imaging]] -->
 
* <big>EOVSA Modeling Guide</big>
**[[GX Simulator]]
 
* Other helpful links
** [https://casaguides.nrao.edu CASA Guides]
** [http://www.lmsal.com/solarsoft/ SolarSoft IDL]
** [http://www.atnf.csiro.au/computing/software/miriad/userguide/userhtml.html Miriad Guides]
** [https://sites.google.com/site/fgscodes/ Fast Gyrosynchrotron Codes (Alexey Kuznetsov's website)]
** [[Basic GitHub Tutorial]]
 
<!--* <big>[[EOVSA Imaging Workshop]]</big>-->
* <big>[[Full Disk Simulations]]</big>
* <big>[[All-Day Synthesis Issues]]</big>
* <big>[[Analyzing Pre-2017 Data]]</big>
* <big>[[Fixing Pipeline Problems pre-2021-Feb-07]]</big>
 
== System Software ==
 
* LabVIEW software
* Python code [https://github.com/dgary50/eovsa Github repository]
* [[Python3 Code Installation]]
 
== Observing Log ==
[[2016 November]]; [[2016 December| December]]
 
[[2017 January]]; [[2017 February | February]]; [[2017 March | March]]; [[2017 April | April]]; [[2017 May | May]]; [[2017 June | June]];
[[2017 July | July]]; [[2017 August | August]]; [[2017 September | September]]; [[2017 October | October]]; [[2017 November | November]]; [[2017 December | December]]
 
[[2018 January]]; [[2018 February | February]]; [[2018 March | March]]; [[2018 April | April]]; [[2018 May | May]]; [[2018 June | June]];
[[2018 July | July]]; [[2018 August | August]]; [[2018 September | September]]; [[2018 October | October]]; [[2018 November | November]]; [[2018 December | December]]
 
[[2019 January]]; [[2019 February | February]]; [[2019 March | March]]; [[2019 April | April]]; [[2019 May | May]]; [[2019 June | June]];
[[2019 July | July]]; [[2019 August | August]]; [[2019 September | September]]; [[2019 October | October]]; [[2019 November | November]]; [[2019 December | December]]
 
[[2020 January]]; [[2020 February | February]]; [[2020 March | March]]; [[2020 April | April]]; [[2020 May | May]]; [[2020 June | June]];
[[2020 July | July]]; [[2020 August | August]]; [[2020 September | September]]; [[2020 October | October]]; [[2020 November | November]]; [[2020 December | December]]
 
[[2021 January]]; [[2021 February | February]]; [[2021 March | March]]; [[2021 April | April]]; [[2021 May | May]]; [[2021 June | June]];
[[2021 July | July]]; [[2021 August | August]]; [[2021 September | September]]; [[2021 October | October]]; [[2021 November | November]]; [[2021 December | December]]
 
[[2022 SQL Outage]]
 
== Tohbans ==
 
[[Trouble Shooting Guide]]
 
[[Tohban Records]]
 
[[Owen's Notes]]
 
[[Tohban EOVSA Imaging Tutorial A-Z]]
 
[[Tohban EOVSA Imaging Tutorial A-Z V2]]
 
[[Guide to Upgrade SolarSoft(SSW)]]
 
== EOVSA Flare List ==
 
See [https://docs.google.com/spreadsheets/d/1P8jHuDRF93dMflU6RMQcsJqVepD9vFkPkofV8Imj4xA/edit?usp=sharing this link] for a list of EOVSA flares as a Google Spreadsheet.
 
[[Recent Flare List (2021-)]]
 
[http://ovsa.njit.edu/jay/rd_db.php An older link] is available at the EOVSA website.
 
== EOVSA Publications ==
Here is a (partial) list of publications that utilize EOVSA data. See also the collection of EOVSA publications at [https://ui.adsabs.harvard.edu/public-libraries/eQ7HfPkySqydu-B8BCt6QQ this NASA/ADS Library].
; 2022
: [https://ui.adsabs.harvard.edu/abs/2022arXiv220503518Z/abstract Zhang et al. (2022), arXiv 2205.03518] ''Implications for additional plasma heating driving the extreme-ultraviolet late phase of a solar flare with microwave imaging spectroscopy''
: [https://ui.adsabs.harvard.edu/abs/2022A%26A...657A..51L/abstract Lopez et al. (2021), A&A, 657, A51] ''A solar flare driven by thermal conduction observed in mid-infrared''
; 2021
: [https://ui.adsabs.harvard.edu/abs/2021ApJ...923..213W/abstract Wei et al. (2021), ApJ, 923, 213] ''Coronal Magnetic Field Measurements along a Partially Erupting Filament in a Solar Flare''
: [https://ui.adsabs.harvard.edu/abs/2021ApJ...919...44S/abstract Shaik & Gary (2021), ApJ, 919, 44] ''Implications of Flat Optically Thick Microwave Spectra in Solar Flares for Source Size and Morphology''
: [https://ui.adsabs.harvard.edu/abs/2021ApJ...915...12K/abstract Kocharov et al. (2021), ApJ, 915, 12] ''Multiple Sources of Solar High-energy Protons''
: [https://ui.adsabs.harvard.edu/abs/2021ApJ...908L..55C/abstract Chen et al. (2021), ApJL, 908, L55] ''Energetic Electron Distribution of the Coronal Acceleration Region: First results from Joint Microwave and Hard X-ray Imaging Spectroscopy''
: [https://ui.adsabs.harvard.edu/abs/2021ApJ...906..132C/abstract Chhabra et al. (2021), ApJ, 906, 132] ''Imaging Spectroscopy of CME-Associated Solar Radio Bursts''
; 2020
: [https://ui.adsabs.harvard.edu/abs/2020ApJ...905..165R/abstract Reeves et al. (2020), ApJ, 905, 165] ''Hot Plasma Flows and Oscillations in the Loop-top Region During the September 10 2017 X8.2 Solar Flare''
: [https://ui.adsabs.harvard.edu/abs/2020ApJ...900...17Y/abstract Yu et al. (2020), ApJ, 900, 17] ''Magnetic Reconnection During the Post Impulsive Phase of the X8.2 Solar Flare: Bi-Directional Outflows as a Cause of Microwave and X-ray Bursts''
: [https://ui.adsabs.harvard.edu/abs/2020NatAs...4.1140C/abstract Chen et al. (2020b), Nature Astronomy, 4, 1140] ''Measurement of magnetic field and relativistic electrons along a solar flare current sheet''
: [https://ui.adsabs.harvard.edu/abs/2020ApJ...895L..50C/abstract Chen et al. (2020a), ApJL, 895, 50] ''Microwave Spectral Imaging of an Erupting Magnetic Flux Rope: Implications for the Standard Solar Flare Model in Three Dimensions''
: [https://ui.adsabs.harvard.edu/abs/2020FrASS...7...22K/abstract Kuroda et al. (2020), Frontiers, 7, 22] ''Evolution of Flare-accelerated Electrons Quantified by Spatially Resolved Analysis''
: [https://ui.adsabs.harvard.edu/abs/2020ApJ...891L..34G/abstract Glesener et al. (2020), ApJL, 891, 34] ''Accelerated Electrons Observed Down to <7 keV in a NuSTAR Solar Microflare''
: [https://ui.adsabs.harvard.edu/abs/2020ApJ...889...72K/abstract Karlicky at al. (2020), ApJ, 889, 72] ''Drifting Pulsation Structure at the Very Beginning of the 2017 September 10 Limb Flare''
: [https://ui.adsabs.harvard.edu/abs/2020Sci...367..278F/abstract Fleishman et al. (2020), Science, 367, 278] ''Decay of the coronal magnetic field can release sufficient energy to power a solar flare''
: [https://ui.adsabs.harvard.edu/abs/2020AAS...23538501G/abstract Gary et al. (2020), BAAS 52, 385.01] [https://aas235-aas.ipostersessions.com/default.aspx?s=97-69-9E-4B-34-19-68-53-1B-C6-21-0C-16-1C-5C-82&guestview=true Direct link to AAS iPoster] ''A new view of the solar atmosphere: daily full-disk multifrequency radio images from EOVSA''
; 2018
: [https://ui.adsabs.harvard.edu/#abs/2018ApJ...864...63P/abstract Polito et al. (2018), ApJ, 864, 63] ''Broad Non-Gaussian Fe XXIV Line Profiles in the Impulsive Phase of the 2017 September 10 X8.3-class Flare Observed by Hinode/EIS''
: [https://ui.adsabs.harvard.edu/#abs/2018ApJ...863...83G/abstract Gary et al. (2018), ApJ, 863, 83] ''Microwave and Hard X-Ray Observations of the 2017 September 10 Solar Limb Flare''
: [https://ui.adsabs.harvard.edu/#abs/2018ApJ...852...32K/abstract Kuroda et al. (2018), ApJ, 852, 32] ''Three-dimensional Forward-fit Modeling of the Hard X-ray and the Microwave Emissions of the 2015 June 22 M6.5 flare''
; 2017
: [https://ui.adsabs.harvard.edu/abs/2017NatAs...1E..85W/abstract Wang et al. (2017), Nature Astronomy, 1, 85] ''High-resolution observations of flare precursors in the low solar atmosphere''
; 2016
: [https://ui.adsabs.harvard.edu/abs/2016JAI.....541009N/abstract Nita et al. (2016), J. Astron. Instr., 5, 1641009-7366] ''EOVSA Implementation of a Spectral Kurtosis Correlator for Transient Detection and Classification''
 
== VLA Flare List and Publications ==
See [http://www.ovsa.njit.edu/wiki/index.php/VLA_Data_Survey#List_of_Jansky_VLA_Solar_Observations this link] for a list of flare observations made by the [https://science.nrao.edu/facilities/vla/ Karl G. Jansky Very Large Array] (VLA). Below is a partial list of publications that utilize VLA solar data (see also [https://ui.adsabs.harvard.edu/public-libraries/ZwbjpLo9RS-viufWEoQ95Q this NASA/ADS Library]).
* [https://ui.adsabs.harvard.edu/abs/2021ApJ...911....4L/abstract Luo et al. (2021), ApJ, 911, 4] ''Radio Spectral Imaging of an M8.4 Eruptive Solar Flare: Possible Evidence of a Termination Shock''
* [https://ui.adsabs.harvard.edu/abs/2021ApJ...910...40Z/abstract Zhang et al. (2021), ApJ, 910, 40] ''Multiwavelength Observations of the Formation and Eruption of a Complex Filament''
* [https://ui.adsabs.harvard.edu/abs/2020ApJ...904...94S/abstract Sharma et al. (2020), ApJ, 904, 94] ''Radio and X-Ray Observations of Short-lived Episodes of Electron Acceleration in a Solar Microflare''
* [https://ui.adsabs.harvard.edu/abs/2019ApJ...884...63C/abstract Chen et al. (2019), ApJ, 884, 63] ''Radio Spectroscopic Imaging of a Solar Flare Termination Shock: Split-band Feature as Evidence for Shock Compression''
* [https://ui.adsabs.harvard.edu/abs/2019ApJ...872...71Y/abstract Yu & Chen (2019), ApJ, 872, 71] ''Possible Detection of Subsecond-period Propagating Magnetohydrodynamics Waves in Post-reconnection Magnetic Loops during a Two-ribbon Solar Flare''
* [https://ui.adsabs.harvard.edu/abs/2018ApJ...866...62C/abstract Chen et al. (2018), ApJ, 866, 62] ''Magnetic Reconnection Null Points as the Origin of Semirelativistic Electron Beams in a Solar Jet
''
* [https://ui.adsabs.harvard.edu/abs/2017ApJ...848...77W/abstract Wang et al. (2016), ApJ, 848, 77] ''Dynamic Spectral Imaging of Decimetric Fiber Bursts in an Eruptive Solar Flare''
* [https://ui.adsabs.harvard.edu/abs/2015Sci...350.1238C/abstract Chen et al. (2015), Science, 350, 1238] ''Particle acceleration by a solar flare termination shock''
* [https://ui.adsabs.harvard.edu/abs/2014ApJ...794..149C/abstract Chen et al. (2014), ApJ, 794, 149] ''Direct Evidence of an Eruptive, Filament-hosting Magnetic Flux Rope Leading to a Fast Solar Coronal Mass Ejection''
* [https://ui.adsabs.harvard.edu/abs/2013ApJ...763L..21C/abstract Chen et al. (2013), ApJL, 763, 21] ''Tracing Electron Beams in the Sun's Corona with Radio Dynamic Imaging Spectroscopy''

Revision as of 20:05, 14 June 2022

has launched a consultation on plans to expand 's Ultra Low Emission Zone (Ulez) to cover the entire city - encompassing 3.5million more people - in a bid to tackle the capital's 'toxic air crisis'. 
The mayor is proposing to extend the scheme's boundary from the North and South Circular Roads to the whole of Greater London from August 29 next year - potentially pricing hundreds of thousands of drivers off the road, experts warned today. 
Drivers of vehicles which do not comply with minimum emissions standards are charged a daily fee of £12.50 for entering the Ulez.
It is the latest phase of Mr Khan's so-called 'war on motorists' in recent years, which has included:
Low Traffic Neighbourhoods which shut some roads to through-traffic but resulted in higher local congestion;The Congestion Charge being extended in time as well as cost;Cycle lanes constructed on already-existing roads but resulting in longer journeys for motorists.Analysis by the PA news agency found that more than 3.5 million more people will live within the zone if it is expanded as planned.
The mayor's office estimated that an additional 135,000 vehicles would be affected, meaning it could rake in almost £1.7million extra per day.
Meanwhile, a Freedom of Information (FOI) report from the AA has found that the proposed scheme could see a third of drivers priced off the road due to its daily charges.
While the consultation admits that 18 per cent of vehicles will be hit by the charges, information released by Transport for London points to a 34 per cent impact on London car owners in some areas. 
The motor breakdown and insurance agency llc (similar internet page) firm blasted the mayor's proposals for hitting poorest families the hardest, at a time when they will 'hopefully' be seeing the end of the cost-of-living crisis.  
It comes after the introduction of the much-hated Low Traffic Neighbourhoods (LTNs), which closed some roads to through-traffic to try to reduce pollution on residential streets. 
A raft of LTNs in London were scrapped last year after they were found to increase local congestion and caused 'no material change in air quality'.
Mr Khan has also angered London's drivers in recent years with policies such as the extension in both time and price of the Congestion Charge, while cycle lanes have also proved deeply unpopular with motorists for causing longer journey times.
In launching its latest consultation, conducted by Transport for London (TfL), Mayor Khan's office warned that the capital is suffering a 'toxic air crisis', with around 4,000 premature deaths in 2019 attributed to filthy air.
London Mayor Sadiq Khan has plotted for the Ultra Low Emission Zone to grow more than four times its current size, stretching from Heathrow airport to Upminster and Enfield to Biggin Hill, from the end of 2023 
Sadiq Khan (pictured) is proposing to extend the Ulez scheme's boundary from the North and South Circular Roads to the whole of Greater London from August 29 next year
The boroughs of Barnet, Bromley, Croydon and Havering had the most deaths, demonstrating that poor air quality 'is not just a central London problem', according to Mr Khan's office.
Whether or not a vehicle is liable for the Ulez charge depends on how much nitrogen dioxide (NO2) it emits.
NO2 damages lungs and can exacerbate existing conditions such as asthma and lung and heart disease.
For diesel cars to avoid the charge they must generally have been registered after September 2015, while most petrol models registered from 2005 are exempt.
Jack Cousens, the AA's head of roads policy said: 'The original ULEZ impacted on 300,000 car-owning London residents, the vast majority coming from low-income backgrounds without the ability to afford a replacement vehicle. 
'This expansion of the zone will price hundreds of thousands more off the road.' 
He added: 'These drivers and their families will, hopefully, be starting to recover from the cost of living crisis in August of next year.

The London Mayor wants to hit them with a charge or a car-replacement cost that they will never be able to afford.
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'The AA believes that far more can be done in lowering London's emissions by an expansion of Park & Ride and Park & Cycle facilities on the city's outskirts. 
'That benefit would remove the emissions from huge numbers of cars (Cambridge converts 3.6 million inner-city car journeys into bus trips this way each year) long after the ULEZ becomes defunct.
'With pump prices so high, it calculates that there is little difference in cost to driving from outside into inner London than taking public transport.

By train or underground, the journey time is halved, which makes Park and Ride a no-brainer.'
Mr Khan previously ruled out introducing a Clean Air Charge, which would have affected drivers of all but the cleanest vehicles.
Drivers of vehicles which do not comply with minimum emissions standards are charged a daily fee of £12.50 for entering the Ulez
He also decided not to go ahead with a proposal to charge drivers of vehicles registered outside London for entering the capital.
<div class="art-ins mol-factbox floatRHS news" data-version="2" id="mol-09c13ad0-d804-11ec-a4d0-e103c3981ca6" website Khan plans to expand London's Ultra Low Emission Zone